Two-level led security light with motion sensor

ABSTRACT

The disclosure is a connectivity APP loaded in a mobile phone for configuring a linkable security lighting system comprising a plurality of LED security lights installed outdoors, wherein by operating the connectivity APP the plurality of LED security lights are divided into N groups of member security lights to be linked. Each group of member security lights is assigned a group code to be applied to each member security light in the group such that within the group the member security lights are interlinked wirelessly via wireless signals prefixed with the same group code, wherein when a member security light is initiated by a sensing signal for operating an illumination mode, the member security light being initiated acts as a commander to transmit an instruction signal to activate all member security lights belonging to the same group code to synchronously operate the illumination mode.

CROSS-REFERENCE TO RELATED APPLICATION

This Application is a continuation in part application of prior application Ser. No. 16/668,599, filed Oct. 30, 2019. Ser. No. 16/668,599 is a continuation of application Ser. No. 16/244,671, filed Jan. 10, 2019, which issued as U.S. Pat. No. 10,516,292 on Dec. 24, 2019. U.S. Pat. No. 10,516,292 is a continuation of application Ser. No. 15/896,403, filed Feb. 14, 2018, which issued as U.S. Pat. No. 10,225,902 on Mar. 5, 2019. U.S. Pat. No. 10,225,902 is a continuation of application Ser. No. 15/785,658, filed Oct. 17, 2017, which issued as U.S. Pat. No. 10,326,301 on Jun. 18, 2019. U.S. Pat. No. 10,326,301 is a continuation of application Ser. No. 15/375,777, filed Dec. 12, 2016, which issued as U.S. Pat. No. 9,826,590 on Nov. 21, 2017. U.S. Pat. No. 9,826,590 is a continuation of application Ser. No. 14/836,000, filed Aug. 26, 2015, which issued as U.S. Pat. No. 9,622,325 on Apr. 11, 2017. U.S. Pat. No. 9,622,325 is a divisional of application Ser. No. 14/478,150, filed Sep. 5, 2014, which issued as U.S. Pat. No. 9,445,474 on Sep. 13, 2016. U.S. Pat. No. 9,445,474 is a continuation of application Ser. No. 13/222,090, filed Aug. 31, 2011, which issued as U.S. Pat. No. 8,866,392 on Oct. 21, 2014.

BACKGROUND OF THE INVENTION 1. Technical Field

The present disclosure relates to a lighting apparatus, in particular, to a two-level security LED light with motion sensor

2. Description of Related Art

Lighting sources such as the fluorescent lamps, the incandescent lamps, the halogen lamps, and the light-emitting diodes (LED) are commonly found in lighting apparatuses for illumination purpose. Photoresistors are often utilized in outdoor lighting applications for automatic illuminations, known as the Photo-Control (PC) mode. Timers may be used in the PC mode for turning off the illumination or for switching to a lower level illumination of a lighting source after the lighting source having delivered a high level illumination for a predetermined duration, referred as the Power-Saving (PS) mode. Motion sensors are often used in the lighting apparatus for delivering full-power illumination thereof for a short duration when a human motion is detected, then switching back to the PS mode. Illumination operation controls such as auto-illumination in accordance to the background brightness detection, illumination using timer, illumination operation control using motion sensing results (e.g., dark or low luminous power to fully illuminated), and brightness control are often implemented by complex circuitries. In particular, the design and construction of LED drivers are still of a complex technology with high fabrication cost.

Therefore, how to develop a simple and effective design method on illumination controls such as enhancing contrast in illumination and color temperature for various types lighting sources, especially the controls for LEDs are the topics of the present disclosure.

SUMMARY OF THE INVENTION

An exemplary embodiment of the present disclosure provides a two-level LED security light with motion sensor which may switch to high level illumination in the Power-Saving (PS) mode for a predetermined duration time when a human motion is detected thereby achieve warning purpose using method of electric current or lighting load adjustment. Furthermore, prior to the detection of an intrusion, the LED security light may be constantly in the low level illumination to save energy.

An exemplary embodiment of the present disclosure provides a two-level LED security light including a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a light-emitting unit. The light-emitting unit further includes one or a plurality of series-connected LEDs; when the light sensing control unit detects that the ambient light is lower than a predetermined value, the loading and power control unit turns on the light-emitting unit to generate a high level or a low level illumination; when the light sensing control unit detects that the ambient light is higher than the predetermined value, the loading and power control unit turns off the light-emitting unit; when the motion sensing unit detects a human motion in the PS mode, the loading and power control unit increases the electric current that flows through the light-emitting unit so as to generate the high level illumination for a predetermined duration.

Another exemplary embodiment of the present disclosure provides a two-level LED security light including a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, a light-emitting unit. The light-emitting unit includes a plurality of series-connected LEDs. When the light sensing control unit detects that the ambient light is lower than a predetermined value, the loading and power control unit turns on a portion or all the LEDs of the light-emitting unit to generate a low level or a high level illumination; when the light sensing control unit detects that the ambient light is higher than the predetermined value, the loading and power control unit turns off all the LEDs in the light-emitting unit; when the motion sensing unit detects a human motion in the PS mode, the loading and power control unit turns on a plurality of LEDs in the light-emitting unit and generates the high level illumination for a predetermine duration. An electric current control circuit is integrated in the exemplary embodiment for providing constant electric current to drive the LEDS in the light-emitting unit.

One exemplary embodiment of the present disclosure provides a two-level LED security light including a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a light-emitting unit. The light-emitting unit includes a phase controller and one or a plurality of parallel-connected alternating current (AC)LEDs. The phase controller is coupled between the described one or a plurality parallel-connected ACLEDs and AC power source. The loading and power control unit may through the phase controller control the average power of the light-emitting unit; when the light sensing control unit detects that the ambient light is lower than a predetermined value, the loading and power control unit turns on the light-emitting unit to generate a high level or a lower level illumination; when the light sensing control unit detects that the ambient light is higher than the predetermined value, the loading and power control unit turns off the light-emitting unit; when the motion sensing unit detects a human motion in the PS mode, the loading and power control unit increases the average power of the light-emitting unit thereby generates the high level illumination for a predetermine duration.

According to an exemplary embodiment of the present disclosure, a two-level LED security light includes a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a light-emitting unit. The light-emitting unit includes X high wattage ACLEDs and Y low wattage ACLEDs connected in parallel. When the light sensing control unit detects that the ambient light is lower than a predetermined value, the loading and power control unit turns on the plurality of low wattage ACLEDs to generate a low level illumination; when the light sensing control unit detects that the ambient light is higher than a predetermined value, the loading and power control unit turns off the light-emitting unit; when the motion sensor detects an intrusion, the loading and power control unit turns on both the high wattage ACLEDs and the low wattage ACLEDs at same time thereby generates a high level illumination for a predetermine duration, wherein X and Y are of positive integers.

According to an exemplary embodiment of the present disclosure, a two-level LED security light with motion sensor includes a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a light-emitting unit. The light-emitting unit includes a rectifier circuit connected between one or a plurality of parallel-connected AC lighting sources and AC power source. The loading and power control unit may through the rectifier circuit adjust the average power of the light-emitting unit. When the light sensing control unit detects that the ambient light is lower than a predetermined value, the loading and power control unit turns on the light-emitting unit to generate a low level illumination; when the light sensing control unit detects that the ambient light is higher than the predetermined value, the loading and power control unit turns off the light-emitting unit; when the motion sensing unit detects an intrusion, the loading and power control unit increases the average power of the light-emitting unit thereby generates a high level illumination for a predetermine duration. The rectifier circuit includes a switch parallel-connected with a diode, wherein the switch is controlled by the loading and power control unit.

To sum up, a two-level LED security light with motion sensor provided by an exemplary embodiment in the preset disclosure, may execute Photo-Control (PC) and Power-Saving (PS) modes. When operates in the PC mode, the lighting apparatus may auto-illuminate at night and auto-turnoff at dawn. The PC mode may generate a high level illumination for a predetermined duration then automatically switch to the PS mode by a control unit to generate a low level illumination. When the motion sensor detects a human motion, the disclosed LED security light may immediate switch to the high level illumination for a short predetermined duration thereby achieve illumination or warning effect. After the short predetermined duration, the LED security light may automatically return to the low level illumination for saving energy.

In order to further understand the techniques, means and effects of the present disclosure, the following detailed descriptions and appended drawings are hereby referred, such that, through which, the purposes, features and aspects of the present disclosure can be thoroughly and concretely appreciated; however, the appended drawings are merely provided for reference and illustration, without any intention to be used for limiting the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

FIG. 1 schematically illustrates a block diagram of a two-level LED security light in accordance with an exemplary embodiment of the present disclosure.

FIG. 1A is an enhanced block diagrammed under FIG. 1 to specifically illustrate an embodiment of FIG. 1 for an AC LED two-level security light, wherein the loading and power control unit comprises a switching circuitry and a microcontroller, wherein the switching circuitry further comprises a bidirectional semiconductor switching device for controlling an average electric power to be delivered to the AC LED.

FIG. 1B is an enhanced block diagrammed under FIG. 1 to specifically illustrate an embodiment of FIG. 1 for a DC LED two-level security light, wherein the loading and power control unit comprises a switching circuitry and a microcontroller, wherein the switching circuitry further comprises an unidirectional semiconductor switching device for controlling an average electric power to be delivered to the DC LED.

FIG. 1C is an enhanced block diagrammed under FIG. 1 to specifically illustrate an embodiment of FIG. 1 for a AC LED two-level security light including a first set having N number LEDs and a second set having M number LEDs, wherein the loading and power control unit comprises a switching circuitry and a microcontroller, wherein the switching circuitry further comprises bidirectional semiconductor switching devices for controlling an average electric power to be delivered to the AC LED.

FIG. 1D is an enhanced block diagrammed under FIG. 1 to specifically illustrate an embodiment of FIG. 1 for a DC LED two-level security light including a first set having N number LEDs and a second set having M number LEDs, wherein the loading and power control unit comprises a switching circuitry and a microcontroller, wherein the switching circuitry further comprises unidirectional semiconductor switching devices for controlling an average electric power to be delivered to the DC LED.

FIG. 2A illustrates a schematic diagram of a two-level LED security light in accordance to the first exemplary embodiment of the present disclosure.

FIG. 2B graphically illustrates a timing waveform of a pulse width modulation (PWM) signal in accordance to the first exemplary embodiment of the present disclosure.

FIG. 3A illustrates a schematic diagram of a two-level LED security light in accordance to the second exemplary embodiment of the present disclosure.

FIG. 3B illustrates a schematic diagram of a two-level LED security light in accordance to the second exemplary embodiment of the present disclosure.

FIG. 4A illustrates a schematic diagram of a two-level LED security light in accordance to the third exemplary embodiment of the present disclosure.

FIG. 4B illustrates a timing waveform of two-level LED security light in accordance to the third exemplary embodiment of the present disclosure.

FIG. 5 illustrates a schematic diagram of a two-level LED security light in accordance to the third exemplary embodiment of the present disclosure.

FIG. 6 illustrates a schematic diagram of a two-level LED security light in accordance to the fourth exemplary embodiment of the present disclosure.

FIG. 7 illustrates a schematic diagram of a two-level LED security light in accordance to the fifth exemplary embodiment of the present disclosure.

FIGS. 8A, 8B, 8C and 8D schematically and respectively show I-V relationship charts (Forward Current vs. Forward Voltage) for a white LED chip from each of 4 different LED manufacturers.

FIG. 9 is a data sheet showing data of the minimum forward voltages and maximum forward voltages collected from various LED manufacturers.

FIG. 10A illustrates a block diagram of a connectivity APP loaded in a mobile device in accordance to an exemplary embodiment of the present disclosure.

FIG. 10B illustrates a schematic diagram of an LED security light in accordance to an exemplary embodiment of the present disclosure.

FIG. 10C illustrates a schematic diagram of another LED security light in accordance to an exemplary embodiment of the present disclosure.

FIG. 10D illustrates a system block for establishing a linkable electric apparatuses system in accordance to a generalized exemplary embodiment of the present disclosure.

FIG. 11 illustrates a system flow chart to elucidate a method in setting identification codes for grouping and interlinking LED security light based on FIG. 10A and FIG. 10B in accordance to an exemplary embodiment of the present disclosure.

FIG. 12 illustrates a flow chart to elucidate a system dynamic for operating a linkable LED security lighting system based on FIG. 10A and FIG. 10B in accordance to an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Reference is made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or alike parts.

First Exemplary Embodiment

Refer to FIG. 1, which schematically illustrates a block diagram of a two-level LED security light in accordance to the first exemplary embodiment of the present disclosure. A two-level LED security light (herein as the lighting apparatus)100 includes a power supply unit 110, a light sensing control unit 120, a motion sensing unit 130, a loading and power control unit 140, and a light-emitting unit 150. The power supply unit 110 is used for supplying power required to operate the system, wherein the associated structure includes the known AC/DC voltage converter. The light sensing control unit 120 may be a photoresistor, which may be coupled to the loading and power control unit 140 for determining daytime or nighttime in accordance to the ambient light. The motion sensing unit 130 may be a passive infrared sensor (PIR), which is coupled to the loading and power control unit 140 and is used to detect intrusions. When a person is entering a predetermined detection zone of the motion sensing unit 130, a sensing signal thereof may be transmitted to the loading and power control unit 140.

The loading and power control unit 140 which is coupled to the light-emitting unit 150 may be implemented by a microcontroller. The loading and power control unit 140 may control the illumination levels of the light-emitting unit 150 in accordance to the sensing signal outputted by the light sensing control unit 120 and the motion sensing unit 130. The light-emitting unit 150 may include a plurality of LEDs and switching components. The loading and power control unit 140 may control the light-emitting unit 150 to generate at least two levels of illumination variations.

When the light sensing control unit 120 detects that the ambient light is lower than a predetermined value (i.e., nighttime), the loading and power control unit 140 executes the Photo-Control (PC) mode by turning on the light-emitting unit 150 to generate a high level illumination for a predetermined duration then return to a low level illumination for Power-Saving (PS) mode. When the light sensing control unit 120 detects that the ambient light is higher than a predetermined value (i.e., dawn), the loading and power control unit 140 turns off the light-emitting unit 150. In the PS mode, when the motion sensing unit 130 detects a human motion, the loading and power control unit 140 may increase the electric current which flow through the light-emitting unit 150, to generate the high level illumination for a short predetermined duration. After the short predetermined duration, the loading and power control unit 140 may automatically lower the electric current that flow through the light-emitting unit 150 thus have the light-emitting unit 150 return to low level illumination for saving energy.

Refer to 2A, which illustrates a schematic diagram of a two-level LED security light in accordance to the first exemplary embodiment of the present disclosure. The light sensing control unit 120 may be implemented by a light sensor 220; the motion sensing unit 130 may be implemented by a motion sensor 230; the loading and power control unit 140 may be implemented by a microcontroller 240. The light-emitting unit 250 includes three series-connected LEDs L1˜L3. The LEDs L1˜L3 is connected between a DC source and a transistor Q1, wherein the DC source may be provided by the power supply unit 110. The transistor Q1 may be an N-channel metal-oxide-semiconductor field-effect-transistor (NMOS). The transistor Q1 is connected between the three series-connected LEDs L1˜L3 and a ground GND. The loading and power control unit 140 implemented by the microcontroller 240 may output a pulse width modulation (PWM) signal to the gate of transistor Q1 to control the average electric current. It is worth to note that the electric components depicted in FIG. 2A only serves as an illustration for the exemplary embodiment of the present disclose and hence the present disclosure is not limited thereto.

Refer to FIG. 2B concurrently, which graphically illustrates a timing waveform of a pulse width modulation (PWM) signal in accordance to the first exemplary embodiment of the present disclosure. In the PC mode, the PWM signal may be used to configure the transistor Q1 to have the conduction period T_(off) being longer than the cut-off period T_(off). On the other hand in the PS mode, the PWM signal may configure the transistor Q1 to have the conduction period T_(on) being shorter than the cut-off period T_(off). In comparison of the illumination levels between the PC and PS modes, as the conduction period T_(on) of transistor Q1 being longer under the PC mode, therefore have higher average electric current driving the light-emitting unit 250 thereby generate high illumination, which may be classified as the high level illumination; whereas as the conduction period T_(on) of transistor Q1 is shorter in the PS mode, therefore have lower average electric current driving the light-emitting unit 250 thereby generate low illumination, which may be classified as the low level illumination.

The microcontroller 240 turns off the light-emitting unit 250 during the day and activates the PC mode at night by turning on the light-emitting unit 250 to generate the high level illumination for a short predetermined duration then return to the low level illumination thereby entering the PS mode. When the motion sensor 230 detects a human motion in the PS mode, the light-emitting unit 250 may switch to the high level illumination for illumination or warning application. The light-emitting unit 250 may return to the low level illumination after maintaining at the high level illumination for a short predetermined duration to save energy.

In addition, the microcontroller 240 is coupled to a time setting unit 260, wherein the time setting unit 260 may allow the user to configure the predetermined duration associated with the high level illumination in the PC mode, however the present disclosure is not limited thereto. The time setting unit is a type of external control units designed to detect various external control signals and to convert the various external control signals into various message signals interpretable by the controller for setting various operating parameters of a security light including at least a time length setting for various illumination modes, a light intensity setting for various illumination modes and switching between illumination modes. The external control units may be configured with a push button, a touch sensor, a voltage divider, a power interruption detection circuitry or a wireless remote control receiver for generating message signals interpretable by the controller.

Second Exemplary Embodiment

Refer again to FIG. 1, wherein the illumination variations of the light-emitting unit 150 may be implemented through the number of light-source loads being turned on to generate more than two levels of illumination. The lighting apparatus 100 in the instant exemplary embodiment may be through turning on a portion of LEDs or all the LEDs to generate a low and a high level of illuminations.

Refer to FIG. 3A concurrently, which illustrates a schematic diagram of a two-level LED security light 100 in accordance to the second exemplary embodiment of the present disclosure. The main difference between FIG. 3A and FIG. 2A is in the light-emitting unit 350, having three series-connected LEDs L1˜L3 and NMOS transistors Q1 and Q2. The LEDs L1˜L3 are series connected to the transistor Q1 at same time connected between the DC source and a constant electric current control circuit 310. Moreover, transistor Q2 is parallel connected to the two ends associated with LEDs L2 and L3. The gates of the transistors Q1 and Q2 are connected respectively to a pin PC and a pin PS of the microcontroller 240. The constant electric current control circuit 310 in the instant exemplary embodiment maintains the electric current in the activated LED at a constant value, namely, the LEDs L1˜L3 are operated in constant-current mode.

Refer to FIG. 3A, the pin PC of the microcontroller 240 controls the switching operations of the transistor Q1; when the voltage level of pin PC being either a high voltage or a low voltage, the transistor Q1 may conduct or cut-off, respectively, to turn the LEDs L1˜L3 on or off. The pin PS of the microcontroller 240 controls the switch operations of the transistor Q2, to form two current paths 351 and 352 on the light-emitting unit 350. When the voltage at the pin PS of the microcontroller 240 is high, the transistor Q2 conducts, thereby forming the current path 351 passing through the LED L1 and the transistor Q2; when the voltage at the pin PS being low, the transistor Q2 cuts-off, thereby forming the current path 352 passing through all the LEDs L1˜L3. The microcontroller 240 may then control the switching operation of the transistor Q2 to turn on the desired number of LEDs so as to generate a high or a low level illumination.

When light sensor 220 detects that the ambient light is higher than a predetermined value, the microcontroller 240 through the pin PC outputs a low voltage, which causes the transistor Q1 to cut-off and turns off all the LEDs L1˜L3 in the light-emitting unit 350. Conversely, when the light sensor 220 detects that the ambient light is lower than the predetermined value, the microcontroller 240 activates the PC mode, i.e., outputting a high voltage from pin PC and a low voltage from pin PS, to activate the transistor Q1 while cut-off the transistor Q2, thereby forming the current path 352, to turn on the three LEDs L1˜L3 in the light-emitting unit 350 so as to generate the high level illumination for a predetermined duration. After the predetermined duration, the microcontroller 240 may switch to the PS mode by having the pin PC continue outputting a high voltage and the pin PS outputting a high voltage, to have the transistor Q2 conducts, thereby forming the current path 351. Consequently, only the LED L1 is turned on and the low level illumination is generated.

When the motion sensor detects a human motion in the PS mode, the pin PS of the microcontroller 240 temporarily switches from the high voltage to a low voltage, to have the transistor Q2 temporarily cuts-off thus forming the current path 352 to activate all the LEDs in the light-emitting unit 350, thereby temporarily generates the high level illumination. The light-emitting unit 350 is driven by a constant electric current, therefore the illumination level generated thereof is directly proportional to the number of LEDs activated. FIG. 3B illustrates another implementation for FIG. 3A, wherein the relays J1 and J2 are used in place of NMOS transistors to serve as switches. The microcontroller 240 may control the relays J2 and J1 through regulating the switching operations of the NPN bipolar junction transistors Q4 and Q5. Moreover, resistors R16 and R17 are current-limiting resistors.

In the PC mode, the relay J1 being pull-in while the relay J2 bounce off to have constant electric current driving all the LEDs L1˜L3 to generate the high level illumination; in PS mode, the relays J1 and J2 both pull-in to have constant electric current only driving the LED L1 thus the low level illumination may be thereby generated. Furthermore, when the motion sensor 230 detects a human motion, the pin PS of the microcontroller 240 may temporarily switch from high voltage to low voltage, forcing the relay J2 to temporarily bounce off and the relay J1 pull-in so as to temporarily generate the high level illumination.

The LED L1 may adopt an LED having color temperature of 2700K while the LEDs L2 and L3 may adopt LEDs having color temperature of 5000K in order to increase the contrast between the high level and the low level illuminations. The number of LEDs included in the light-emitting unit 350 may be more than three, for example five or six LEDs. The transistor Q2 may be relatively parallel to the two ends associated with a plurality of LEDs to adjust the illumination difference between the high and the low illumination levels. Additionally, the light-emitting unit 350 may include a plurality of transistors Q2, which are respectively coupled to the two ends associated with each LED to provide more lighting variation selections. The microcontroller 240 may decide the number of LEDs to turn on in accordance to design needs at different conditions. Based on the explanation of the aforementioned exemplary embodiment, those skills in the art should be able to deduce other implementation and further descriptions are therefore omitted.

Third Exemplary Embodiment

Refer back to FIG. 1, wherein the light-emitting unit 150 may include a phase controller and one or more parallel-connected alternating current (AC) LEDs. The phase controller is coupled between the described one or more parallel-connected ACLEDs and AC power source. The loading and power controller 140 in the instant exemplary embodiment may through the phase controller adjust the average power of the light-emitting unit 150 so as to generate variations in the low level and the high level illuminations.

Refer to FIG. 4A, which illustrates a schematic diagram of a two-level LED security light 100 in accordance to the third exemplary embodiment of the present disclosure. The main difference between FIG. 4A and FIG. 3 is in that the light-source load is an ACLED, which is coupled to the AC power source, and further the light-emitting unit 450 includes a phase controller 451. The phase controller 451 includes a bi-directional switching device 452, here, a triac, a zero-crossing detection circuit 453, and a resistor R. The microcontroller 240 turns off the light-emitting unit 450 when the light sensor 220 detects that the ambient light is higher than a predetermined value. Conversely, when the light sensor 220 detects that the ambient light is lower than the predetermined value, the microcontroller 240 activates the PC mode by turning on the light-emitting unit 450. In the PC mode, the microcontroller 240 may select a control pin for outputting a pulse signal which through a resistor R triggers the triac 452 to have a large conduction angle. The large conduction angle configures the light-emitting unit 450 to generate a high level illumination for a predetermined duration. Then the microcontroller 240 outputs the pulse signal for PS mode through the same control pin to trigger the triac 452 to have a small conduction angle for switching the light-emitting unit 450 from the high level illumination to the low level illumination of the PS mode. Moreover, when the motion sensor 230 (also called motion sensing unit) detects a human motion in the PS mode, the microcontroller 240 temporarily outputs the PC-mode pulse signal through the same control pin to have the light-emitting unit 450 generated the high level illumination for a short predetermined duration. After the short predetermined duration, the light-emitting unit 450 returns to the low level illumination.

In the illumination control of the ACLED, the microcontroller 240 may utilize the detected zero-crossing time (e.g., the zero-crossing time of an AC voltage waveform) outputted from the zero-crossing detection circuit 453 to send an AC synchronized pulse signal thereof which may trigger the triac 452 of the phase controller 451 thereby to change the average power input to the light-emitting unit 450. As the ACLED has a cut-in voltage v_(t) for start conducting, thus if the pulse signal inaccurately in time triggers the conduction of the triac 452, then the instantaneous value of AC voltage may be lower than the cut-in voltage v_(t) of ACLED at the trigger pulse. Consequently, the ACLED may result in the phenomenon of either flashing or not turning on. Therefore, the pulse signal generated by the microcontroller 240 must fall in a proper time gap behind the zero-crossing point associated with the AC sinusoidal voltage waveform.

Supposing an AC power source having a voltage amplitude and frequency f, then the zero-crossing time gap t_(D) of the trigger pulse outputted by the microcontroller 240 should be limited according to t_(o)<t_(D)<½f−t_(o) for a light-source load with a cut-in voltage v_(t), wherein t_(o)=(½πf)sin⁻¹ (V_(t)/V_(m)). The described criterion is applicable to all types of ACLEDs to assure that the triac 452 can be stably triggered in both positive and negative half cycle of the AC power source. Take ACLED with v_(t) (rms)=80 V as an example, and supposing the V_(m) (rms)=110 v and f=60 Hz, then t_(o)=2.2 ms and (½f)=8.3 ms may be obtained. Consequently, the proper zero-crossing time gap t_(D) associated with the phase modulation pulse outputted by the microcontroller 240 which lagged the AC sinusoidal voltage waveform should be designed in the range of 2.2 ms<t_(D)<6.1 ms.

Refer to FIG. 4B, which illustrates a timing waveform of the two-level LED security light in accordance to the third exemplary embodiment of the present disclosure. Waveforms (a)˜(d) of FIG. 4B respectively represent the AC power source, the output of the zero-crossing detection circuit 453, the zero-crossing delay pulse at the control pin of the microcontroller 240, and the voltage waveform across the two ends of the ACLED in the light-emitting unit 450. The zero-crossing detection circuit 453 converts the AC voltage sinusoidal waveform associated with the AC power source to a symmetric square waveform having a low and a high voltage levels as shown in FIG. 4B(b). At the zero-crossing point of the AC voltage sinusoidal wave, the symmetric square waveform may transit either from the low voltage level to the high voltage level or from the high voltage level to the low voltage level. Or equivalently, the edge of the symmetric square waveform in the time domain corresponds to the zero-crossing point of the AC voltage sinusoidal waveform. As shown in FIG. 4B(c), the microcontroller 240 outputs a zero-crossing delay pulse in correspondence to the zero-crossing point of the AC sinusoidal waveform in accordance to the output waveform of the zero-crossing detection circuit 453. The zero-crossing delay pulse is relative to an edge of symmetric square waveform behind a time gap t_(D) in the time domain. The t_(D) should fall in a valid range, as described previously, to assure that the triac 452 can be stably triggered thereby to turn on the ACLED. FIG. 4B(d) illustrates a voltage waveform applied across the two ends associated with the ACLED. The illumination level of the light-emitting unit 450 is related to the conduction period t_(on) of the ACLED, or equivalently, the length t_(on) is directly proportional to the average power inputted to the ACLED. The difference between the PC mode and the PS mode being that in the PC mode, the ACLED has longer conduction period, thereby generates the high level illumination; whereas in the PS mode, the ACLED conduction period is shorter, hence generates the low level illumination.

Refer to FIG. 5, which illustrates a schematic diagram of a two-level LED security light 100 in accordance to the third exemplary embodiment of the present disclosure. The light-emitting unit 550 of the lighting apparatus 100 includes an ACLED1, an ACLED2, and a phase controller 551. The phase controller 551 includes triacs 552 and 553, the zero-crossing detection circuit 554 as well as resistors R1 and R2. The light-emitting unit 550 of FIG. 5 is different from the light-emitting unit 450 of FIG. 4 in that the light-emitting unit 550 has more than one ACLEDs and more than one bi-directional switching devices. Furthermore, the color temperatures of the ACLED1 and the ACLED2 may be selected to be different.

In the exemplary embodiment of FIG. 5, the ACLED1 has a high color temperature, and the ACLED2 has a low color temperature. In the PC mode, the microcontroller 240 uses the phase controller 551 to trigger both ACLED1 and ACLED2 to conduct for a long period, thereby to generate the high level illumination as well as illumination of mix color temperature. In the PS mode, the microcontroller 240 uses the phase controller 551 to trigger only the ACLED2 to conduct for a short period, thereby generates the low level illumination as well as illumination of low color temperature. Moreover, in the PS mode, when the motion sensor 230 detects a human motion, the microcontroller 240 may through the phase controller 551 trigger the ACLED land ACLED2 to conduct for a long period. Thereby, it may render the light-emitting unit 450 to generate the high level illumination of high color temperature and to produce high contrast in illumination and hue, for a short predetermined duration to warn the intruder. Consequently, the lighting apparatus may generate the high level or the low level illumination of different hue. The rest of operation theories associated with the light-emitting unit 550 are essentially the same as the light-emitting unit 450 and further descriptions are therefore omitted.

Fourth Exemplary Embodiment

Refer to FIG. 6, which illustrates a schematic diagram of a two-level LED security light 100 in accordance to the fourth exemplary embodiment of the present disclosure. The light-emitting unit 150 of FIG. 1 may be implemented by the light-emitting unit 650, wherein the light-emitting unit 650 includes three ACLED1˜3 having identical luminous power as well as switches 651 and 652. In which, switches 651 and 652 may be relays. The parallel-connected ACLED1 and ACLED2 are series-connected to the switch 652 to produce double luminous power, and of which the ACLED3 is parallel connected to, to generate triple luminous power, and of which an AC power source is further coupled to through the switch 651. Moreover, the microcontroller 240 implements the loading and power control unit 140 of FIG. 1. The pin PC and pin PS are respectively connected to switches 651 and 652 for outputting voltage signals to control the operations of switches 651 and 652 (i.e., open or close).

In the PC mode, the pin PC and pin PS of the microcontroller 240 control the switches 651 and 652 to be closed at same time. Consequently, the ACLED1˜3 are coupled to the AC power source and the light-emitting unit 650 may generate a high level illumination of triple luminous power. After a short predetermined duration, the microcontroller 240 returns to PS mode. In which the switch 651 is closed while the pin PS controls the switch 652 to be opened, consequently, only the ACLED3 is connected to AC power source, and the light-emitting unit 650 may thus generate the low level illumination of one luminous power. In the PS mode, when the motion sensor 230 detects a human motion, the microcontroller 240 temporarily closes the switch 652 to generate high level illumination with triple luminous power for a predetermined duration. After the predetermined duration, the switch 652 returns to open status thereby to generate the low level illumination of one luminous power. The lighting apparatus of FIG. 6 may therefore through controlling switches 651 and 652 generate two level illuminations with illumination contrast of at least 3 to 1.

The ACLED1 and ACLED2 of FIG. 6 may be high power lighting sources having color temperature of 5000K. The ACLED3 may be a low power lighting source having color temperature of 2700K. Consequently, the ACLED may generate two levels of illuminations with high illumination and hue contrast without using a zero-crossing detection circuit.

Fifth Exemplary Embodiment

Refer to FIG. 7, which illustrates a schematic diagram of a two-level LED security light in accordance to the fifth exemplary embodiment of the present disclosure. The light-emitting unit 750 of FIG. 7 is different from the light-emitting unit 640 of FIG. 6 in that the ACLED3 is series-connected to a circuit with a rectified diode D and a switch 753 parallel-connected together, and of which is further coupled through a switch 751 to AC power source. When the switch 753 closes, the AC electric current that passes through the ACLED3 may be a full sinusoidal waveform. When the switch 753 opens, the rectified diode rectifies the AC power, thus only one half cycle of the AC electric current may pass through the ACLED, consequently the luminous power of ALCED3 is cut to be half.

The pin PS of the microcontroller 240 synchronously controls the operations of switches 752 and 753. If the three ACLED1˜3 have identical luminous power, then in the PC mode, the pin PC and pin PS of the microcontroller 240 synchronously close the switches 751˜753 to render ACLED1˜3 illuminating, thus the light-emitting unit 750 generates a high level illumination which is three-times higher than the luminous power of a single ACLED. When in the PS mode, the microcontroller 240 closes the switch 751 while opens switches 752 and 753. At this moment, only the ACLED3 illuminates and as the AC power source is rectified by the rectified diode D, thus the luminous power of ACLED3 is half of the AC power source prior to the rectification. The luminous power ratio between the high level and the low level illuminations is therefore 6 to 1. Consequently, strong illumination contrast may be generated to effectively warn the intruder.

It should be noted that the light-emitting unit in the fifth exemplary embodiment is not limited to utilizing ACLEDs. In other words, the light-emitting unit may include any AC lighting sources such as ACLEDs, incandescent lamps, or fluorescent lamps.

A lighting apparatus may be implemented by integrating a plurality of LEDs with a microcontroller and various types of sensor components in the controlling circuit in accordance to the above described five exemplary embodiments. This lighting apparatus may automatically generate high level illumination when the ambient light detected is insufficient and time-switch to the low level illumination. In addition, when a person is entering the predetermined detection zone, the lighting apparatus may switch from the low level illumination to the high level illumination, to provide the person with sufficient illumination or to generate strong illumination and hue contrast for monitoring the intruder.

When the light source of the light-emitting unit 150 is confined to the use of an LED load, the compliance and satisfaction of a voltage operating constraint attributable to the unique electrical characteristics of the LED load is vital to a successful performance of an LED lighting device. Any LED lighting device failing to comply with the voltage operating constraint of the unique electrical characteristics is bound to become a trouble art. This is because the LED as a kind of solid state light source has completely different electrical characteristics for performing light emission compared with conventional light source such as incandescent bulbs or fluorescent bulbs. For instance, for a white light or blue light LED there exists a very narrow voltage domain ranging from a threshold voltage at 2.5 volts to a maximum working voltage at 3.3 volts, which allows to operate adequately and safely the LED; in other words, when a forward voltage imposed on the LED is lower than the threshold voltage, the LED is not conducted and therefore no light is emitted, when the forward voltage exceeds the maximum working voltage, the heat generated by a forward current could start damaging the construction of the LED. Therefore, the forward voltage imposed on the LED is required to operate between the threshold voltage and the maximum working voltage.

In respect to the LED load of the light-emitting unit 150, the cut-in voltage V_(t) of ACLEDs is technically also referred to as the threshold voltage attributable to PN junctions manufactured in LEDs. More specifically, the LED is made with a PN junction semiconductor structure inherently featured with three unique electrical characteristics, the first characteristic is one-way electric conduction through the PN junction fabricated in the LED, the second electrical characteristic is the threshold voltage V_(th) required to trigger the LED to start emitting light and the third electrical characteristic is a maximum working voltage V_(max) allowed to impose on the LED to avoid a thermal runaway to damage or burn out the semiconductor construction of the LED. The described cut-in voltage V_(t) has the same meaning as the above mentioned threshold voltage V_(th) which is a more general term to be used for describing the second electrical characteristic of a PN junction semiconductor structure. Also because the cut-in voltage V_(t) is specifically tied to forming a formula to transform the threshold voltage into a corresponding time phase of AC power for lighting control, it is necessary to use the term V_(th) as a neutral word for describing the LED electrical characteristics to avoid being confused with the specific application for ACLED alone. Additionally, it is to be clarified that the term V_(m) is related to the amplitude of the instant maximum voltage of an AC power source which has nothing to do with the third electrical characteristic V_(max) of an LED load.

An LED chip is a small piece of semiconductor material with at least one LED manufactured inside the semiconductor material. A plurality of LEDs may be manufactured and packaged inside an LED chip for different levels of wattage specification to meet different illumination need. For each LED chip designed with a different level of wattage specification there always exists a narrow voltage domain V_(th)<V<V_(max), wherein V is a voltage across the LED chip, V_(th) is the threshold voltage to enable the LED chip to start emitting light and V_(max) is the maximum working voltage allowed to impose on the LED chip to protect the LED chip from being damaged or burned out by the heat generated by a higher working voltage exceeding V_(max).

For an LED load configured with a plurality of the LED chips in any LED lighting device, regardless such LED load being configured with ACLED chips or DC LED chips, the working voltage V of each single LED chip is required to operate in a domain between a threshold voltage V_(th) and a maximum working voltage V_(max) or V_(th)<V<V_(max) and the working voltage V_(N) of the LED load comprising N pieces of LED chips connected in series is therefore required to operate in a domain established by a threshold voltage of N times V_(th) (N×V_(th)) and a maximum working voltage of N times V_(max) (N×V_(max)) or N×V_(th)<V_(N)<N×V_(max), wherein N is the number of the LED chips electrically connected in series. For any LED lighting device comprising an LED load it is required that the LED load in conjunction with an adequate level of power source is configured with a combination of in series and in parallel connections of LED chips such that the electric current passing through each LED chip of the LED load remains at an adequate level such that a voltage V across each LED chip complies with an operating constraint of V_(th)<V<V_(max) featuring electrical characteristics of the LED chip or a voltage V_(N) across the LED load configured with N number of LED chips connected in series complies with an operating constraint of N× V_(th)<V_(N)<N×V_(max). Such narrow operating range therefore posts an engineering challenge for a circuit designer to successfully design an adequate level of power source and a reliable circuitry configured with an adequate combination of in series connection and in parallel connection of LED chips for operating a higher power LED security light.

FIGS. 8A, 8B, 8C and 8D comprises 4 drawings schematically and respectively showing a I-V relationship chart (Forward Current vs. Forward Voltage) for a white light LED chip from each of 4 different LED manufacturers; as can be seen from the chart when a forward voltage V is below a minimum forward voltage at around 2.5 volts, the LED chip is not conducted so the current I is zero, as the forward voltage exceeds 2.5 volts the LED chip is activated to generate a current flow to emit light, as the forward voltage continues to increase, the current I increases exponentially at a much faster pace, at a maximum forward voltage around 3.3 volts the current I becomes 250 mA which generates a heat that could start damaging the PN junction of the LED chip. The minimum forward voltage, i.e., the threshold voltage or the cut-in voltage, and the maximum forward voltage are readily available in the specification sheets at each of LED manufacturers, such as Cree, Lumileds, Samsung, Osram, and etc. Different LED manufacturers may have slightly different figures due to manufacturing process but the deviations of differences are negligible. The constraints of minimum forward voltage and maximum forward voltage represent physical properties inherent in any solid state light source. They are necessary matter for configuring any LED lighting products to ensure a normal performance of an LED load.

FIG. 9 is a data sheet showing data of the minimum forward voltages and maximum forward voltages collected from various LED manufacturers. They are fundamental requirements for configuring any LED lighting control devices to ensure a successful performance of any LED lighting device.

In summary, the compliance of voltage operating constraint V_(th)<V<V_(max) featuring electrical characteristics of an LED chip is a critical technology for ensuring a normal performance of the LED load. Failing to comply with such voltage operating constraint can quickly age or seriously damage the semiconductor structure of the LED chip with a consequence of quick lumens depreciation of the LED bulbs and the product lifetime being substantially shortened, which will be unacceptable to the consumers. The compliance of the operating constraint V_(th)<V<V_(max) is a necessary matter for any LED lighting device though it is not an obvious matter as it requires complicated technologies to calculate and coordinate among an adequate level of power source, a control circuitry and a non-linear light emitting load. For conventional lighting load such as incandescent bulb there exists no such operating constraint. This is why in the past years there had been many consumers complaining about malfunction of LED bulbs that the consumers were frustrated with the fast depreciation of lumens output and substantially shortened product lifetime of the LED bulbs purchased and used. A good example was a law suit case filed by the Federal Trade Commission on Sep. 7, 2010 (Case No. SACV10-01333 JVS) for a complaint against a leading lighting manufacturer for marketing deceptive LED lamps and making false claims with respect to the life time of their LED lamps and a huge amount of monetary relief was claimed with the Court in the complaint.

The present disclosure of a two-level LED security light provides a unique lifestyle lighting solution. The motivation of creating such lifestyle lighting solution has less to do with the energy saving aspect of the low level illumination mode because an LED is already a very energy saving light source compared with the conventional incandescent light source. For instance, a 10-watt LED security light when operated at a low level at 30% illumination it only saves 7 watts, which is not as significant as a 100-watt incandescent bulb which can save as much as 70 watts when operated at 30% illumination for a low level mode. While it is always good to save some extra energy, it is however not the main incentives for developing the present invention; the life-style lighting solution of the present disclosure is featured with two innovations which meaningfully improve the exquisite tastes of living in the evening, the first innovation is the creation of an aesthetic scene for the outdoor living environment, wherein at dusk the LED security light is automatically turned on by the photo sensor to perform the low level illumination with a low color temperature which is necessary for creating a soft and aesthetic night scene for the outdoor living area (such soft and aesthetic night view is not achievable by the high level illumination however), the second innovation is the creation of a navigation capacity similar to a light house effect for guiding people to safely move toward a destination in the outdoor living area without getting lost or encountering an accident, wherein when a motion intrusion is detected by the motion sensor the security light is instantly changed to perform a high level illumination mode with a high color temperature light which offers people a high visibility of the surrounding environment when needed. For the visibility of a surrounding environment the high color temperature light is the winner while for the creation of a soft and aesthetic night view there is no substitute for the low color temperature light. It is the innovation of the present invention to configure a lifestyle security light with a low color temperature LED load and a high color temperature LED load respectively activated by a photo sensor and a motion sensor to resemble the natural phenomenon of a sun light. These two innovative functions ideally implemented by the LED loads coupled with the motion sensor to increase illumination with a high visibility when people enters into the short detection area make the present invention a perfect lifestyle lighting solution for enjoying an exquisite taste of evening life.

The technical infrastructure of a two-level LED security lights for various embodiments as disclosed can be further enhanced and applied to form a linkable LED security lighting system configured with a plurality of member LED security lights by incorporating a wireless transceiver, namely, a device including a wireless transmitter and a wireless receiver, for connecting and communicating with all neighboring member LED security lights to synchronously control on/off, dimming and color temperature tuning performances of all linked member LED security lights.

Prior art U.S. Pat. No. 10,271,404 disclosed a hardware based technology for a linked security lighting system established by using an interface including a channel selector switch for selecting a channel to which each lighting unit will be connected. In this way a network can be created by placing the lighting units proximate to each other and selecting the same channel at the interface at each lighting unit. In general, this hardware based technology would be limited in some aspects, such as less flexibility in extending channel number when a vast network connectivity is required. The present disclosure discloses a software based technology for establishing a linkable LED security lighting system using a connectivity APP designed and loaded in a mobile phone; wherein the connectivity APP is configured with two operating processes, wherein a first operating process is to establish a data base of installed locations for all of said plurality of LED security lights with each of the plurality of LED security lights being assigned a location code for identification and for individual control, wherein a second operating process is a grouping job to divide the plurality of LED security lights into at least one group of linkable LED security lights with each group being assigned a group code applicable to each LED security light in the same group for identification and for synchronously performing same illumination; wherein the connectivity APP is wirelessly connected with each LED security light of the plurality LED security lights for generating, assigning, receiving, setting and recording at least a location code, at least a group code and or at least one universal code to each LED security light of the plurality of LED security lights, wherein the location code, the group code and or the at least one universal code are stored in a memory unit of each LED security light, wherein after the data base of installed locations for the plurality of LED security lights being fully established each LED security light displayed visually on a screen of the mobile device becomes identifiable on the connectivity APP to a user to perform a grouping or re-grouping job.

The connectivity APP is a software tool to configure a linkable structure of a plurality of LED security lights of a lighting system installed in an outdoor living space. The connectivity APP involves a necessary process including to assign a location code and a group code for each LED security light installed in the outdoor living space and to key in correspondingly a location code for each LED security light shown on the screen of the connectivity APP. The linkable structure, for instance, represented by a tree map of LED security lights interlinked and displayed visually on the connectivity APP, can be changed by modifying the location codes or the group codes to create new linkable groups of the plurality of LED security lights. Using modifiable location code assigned to each LED security light, the connectivity APP has the advantages to efficiently and almost unlimited establish a linkable LED security lighting system.

Specifically, the plurality of LED security lights of the linkable LED security lighting system are divided into N groups of member LED security lights to be linked. Each group of member LED security lights is assigned a location code to be applied to each member LED security light in the group by operating the connectivity APP for identification and communication, such that within the group the member LED security lights are interlinked preferably created via wireless control signals prefixed with a same location code transmitted thru a transceiver in each of the member LED security lights, wherein when a member LED security light first receives a sensing signal for operating an illumination mode, the member LED security light acts as a a commanding member LED security light to activate all member LED security lights assigned with the same location code to operate the illumination mode, wherein upon receiving the sensing signal the controller of the commanding member LED security light operates to output a control signal to activate the illumination mode, at the same time the controller manages to wirelessly transmit an instruction signal prefixed with the location code to remotely activate at least one neighboring member LED security light with same location code to synchronously operate the illumination mode as performed by the commanding member LED security light.

It is to be noticed that the software based technology disclosed in the present disclosure has at least four advantages over the hardware based technology disclosed in the U.S. Pat. No. 10,271,404.

First, the present disclosure allows a user to expand a linking space of N groups unlimitedly at any time while the Prior Art of U.S. Pat. No. 10,271,404 is very much fixed and restricted to a limited number of selections according to a configuration of the channel selector.

Second, the connectivity APP of the present disclosure can be designed to enable a cross-group illumination option, wherein the controller of at least one selected security light is designed to be additionally responsive to at least one wireless instruction signal with a different location code transmitted from at least one separate group.

Third, the present disclosure can be designed to operate a hybrid linkable security lighting system, wherein the controller is programmed to respond to at least two wireless instruction signals including a first wireless signal with a universal code which can synchronously activate every security light in the lighting system to be turned on at dusk and to be turned off at dawn, and a second wireless signal prefixed with a location code or a group code to synchronously activate the security lights in a linkable group to perform same illumination when a security light in the linkable group first detects a motion signal.

Fourth, once a location code has been assigned and set with every security light in the lighting system and the connectivity APP, the user can easily change or modify a grouping arrangement on the connectivity APP without going to each security light for adjusting each channel selector one by one which may require using a ladder for accessing to each security light for performing manual adjustment.

Referring to FIGS. 10A, 10B, 10C and 10D which illustrate a framework for establishing a linkable security light system in accordance to an exemplary embodiment of the present disclosure. Please refer to FIG. 10A. A connectivity APP 801 is pre-loaded in a mobile device 800, for instance, a mobile phone, for configuring a linkable structure of a plurality of LED security lights of a lighting system. The plurality of LED security lights are divided into a plurality of linkable groups 803 with each linkable group G(i) designated by a location code for each security light of G(i) group and a group code 805. The mobile device is equipped with a transceiver 862, wherein the transceiver includes a wireless transmitter and a wireless receiver, as shown in FIG. 10A, for bi-directional communications during configuring the linkable structure when operating the connectivity APP. To enable bi-directional communication, a wireless signal processed by the transceiver comprises a group code to identify a linkable group G(i), a location code to identify a single LED security light to be linked in the linkable group G(i) and an instruction code for executing an operation. The location codes and the group codes of the linkable groups are transmitted via wireless signal thru the transceiver of the mobile device to each LED security light in the linkable group. Please refer to FIG. 10B. The LED security light 900 is basically composed of a loading and power control unit 940, a light-emitting unit 950 comprising an LED light load, a plurality of sensors 920, 930, an external control unit 960 including time setting devices 961, external control devices 963 and a transceiver 962. The transceiver 962 is further composed of a receiver 9621 and a transmitter 9622. The loading and power control unit 940 including a controller and a switching circuitry, wherein the controller is preferably a microcontroller with embedded memory unit, wherein the location codes and the group codes transmitted from the connectivity APP are received by the receiver 9621 and memorized by the controller of the LED security light for coding an outgoing wireless signal and verifying an incoming wireless signal thru the transceiver of the LED security light during processing a setting of the location codes and the group codes, as shown in FIG. 10B, for enabling a linkable operation. Please further refer to FIG. 10C. The LED security light 901 is basically similar to the LED security light 900 in FIG. 10B. The only difference is that the LED security light 901 does not have external control devices and time setting devices. All the functional parameters are set thru the connectivity APP of the mobile device 800.

The location codes and the group codes of the linkable structure can be changed or modified by operating the connectivity APP for creating a new linkable structure, and the group belonging of the LED security lights is then changed accordingly. This is a great advantage of the present disclosure when rearranging a tree map of the LED security lights is required, wherein desired linked groups can be easily created and tested on a software basis without resorting to adjusting the installation positions of the LED security lights to be linked.

Referring to FIG. 10D which illustrates a system block 1000 for establishing a linkable electric apparatuses system. FIG. 10D shows a general block 1000 with capability to bi-directionally communicate with a connectivity APP and proximate general blocks of the same type 1000. The general block 1000 is composed of a loading and power control unit 1040, an electric load 1050, a sensing control unit 1030 and an external control unit 1060. The loading and power control unit 1040 includes a controller and a switching circuitry electrically coupled to the electric load 1050. The electric load 1050 may be an LED light load, a ceiling fan, or any electric appliance used in house. The external control unit 1060 is designed for adjusting operation parameters of the electric load 1050 and includes at least a time setting device 1061, a transceiver 1062 and at lest an external control device 1063. The transceiver 1062 of the external control unit 1060 enables thru wireless signals creating a network of different electric apparatuses with different electric load types linkable and programmable by the connectivity APP.

Referring to FIG. 11 in view of FIG. 10A and FIG. 10B which illustrates a system flow chart for a method for setting a location code or a group code in accordance to an exemplary embodiment of the present disclosure. The method starts with Step 1 to open the connectivity APP on the mobile phone. Then, Step 2 is to divide the plurality of LED security lights in the lighting system into N linkable groups of illumination zone with each linkable group comprising at least two LED security lights to be linked for synchronously performing same illumination options, such as, on/off control, dimming control or color temperature tuning control, triggered by various sensors. The setting of N linkable group is starting from a process index i=0. Step 3 is to turn on all LED security lights in a first linkable group G(i), wherein i=1. Step 4 is thru wireless signal transmitted from a transceiver 862, as shown in FIG. 10A, to wirelessly connect the connectivity APP 801 to a first linkable group of selected LED security lights 900, wherein G(i)=G(1). Step 5 is to display the selected LED security lights in G(i) group to appear on APP control page of a mobile phone. Step 6 is to assign identification codes to the first linkable group of selected LED security lights with each of the selected LED security lights being assigned a location code and a first group code. Step 7 is for transmitting the location code and the first group code thru wireless signal transmitted from the transceiver to each LED security light in the first linkable group G(i), wherein the location code and the the first group code are received and memorized by a controller, being a microcontroller 940 as shown in FIG. 10B, of the LED security light for coding an outgoing wireless signal and verifying an incoming wireless signal for enabling a linkable operation. After completing the setting of the first group code for the first linkable group and after checking the process index i≠N, the process resumes to Step 3 for setting a second group code for a second group of selected LED security lights thru Step 7. The recurring process continues till all N linkable groups and all LED security lights have completed setting of relevant location and group codes for identification and communication. When a plurality of selected LED security lights in a linkable group are interlinked, each LED security light installed at different locations around an outdoor living area can perform both roles of being a commander as well as being a follower to synchronously perform on/off control, dimming control or color temperature tuning control.

Referring to FIG. 12 in view of FIG. 10A and FIG. 10B in accordance to an exemplary embodiment of the present disclosure which uses a block diagram to briefly illustrate a system dynamic for configuring and operating a linkable LED security lighting system following a completion of setting all location codes for all LED security lights in the system flow chart FIG. 11.

At dusk when a light sensing control unit 920 of one of the plurality of LED security lights in a linkable group first detects a night time signal (S121), in other words, the ambient light of the operating location detected by the light-sensing control unit being lower than a first predetermined value, the LED security light is responsively switched for operating a low level illumination mode to perform a low level illumination (S122), and at the same time the LED security light acts as a commanding LED security light to activate all LED security lights in the linkable group, each recognizable with same group code of the one of the commanding LED security light, as followers in the lighting system to synchronously operate the low level illumination mode to perform the low level illumination, wherein a controller of the commanding LED security light operates to output a first wireless signal prefixed with a universal code recognizable by the LED security lights in the linkable group, wherein the LED security lights in the linkable group are activated to synchronously operate the low level illumination mode to perform the low level illumination (S123); wherein during a performance of the low level illumination mode when an LED security light in a linkable group first detects a motion signal thru a motion sensor (S124), the LED security light accordingly is switched to a motion sensor mode for operating a high level illumination for a preset time length and then resuming to the low level illumination (S125), and at the same time the LED security light acts as a commanding LED security light to order all linked LED security lights in the linkable group to temporarily switch to activate the motion sensor mode to perform a high level illumination for the preset time length before resuming to the low level illumination mode (S126), wherein the commanding LED security light operates to transmit a second wireless signal coded with a group code of the one of the commanding LED security light thru the transceiver recognizable by the LED security lights assigned with the same group code in the linkable group, wherein the LED security lights in the linkable group are activated synchronously to operate the motion sensor mode.

At dawn when a light sensing control unit of an LED security light in the lighting system first detects a daytime signal meaning the ambient light detected by the light sensing control unit being higher than a second predetermined value (S127), the LED security light acts as a commanding LED security light to synchronously deactivate the plurality of LED security lights in the lighting system; wherein the controller of the commanding LED security light operates to stop outputting the first wireless signal and the second wireless signal to turn off the light-emitting units (S128), at the same time the controller of the commanding LED security light operates to generate and transmit thru the transceiver a third wireless signal coded with a universal code to deactivate at least one LED security light to turn off the at least one LED light-emitting unit (S129).

The above disclosed embodiments and technologies are able to provide home owners with a 360 degree illumination surrounding a house for a great security protection as all linked member LED security lights can brighten instantly at the same time when a motion intrusion at any spot is detected by one of the plurality of member LED security lights. If the home owner does not need a full surrounding illumination the home owner can simply manage to divide the plurality of member LED security lights into linked group and non-linked group such that a partial surrounding illumination can be performed by the linked group of member LED security lights while the non-linked group of LED security lights simply operate the two-level illumination individually and independently.

The technology of connectivity APP is not limited to the application of the linkable outdoor security lighting system working with photo sensor and or motion sensor. In fact, it can also be used to generally replace traditional channel selection switch for remotely controlling individual light or grouped lights among a plurality of lights, or individual ceiling fan or grouped ceiling fans installed in a living space; similar processes may be employed to create a location code, a group code and/or at least one universal code as a communication medium for executing a control decision of a lighting control decision between a connectivity APP designed and loaded in a mobile device such as mobile phone and each of the plurality of lights and or ceiling fans, wherein said location code is used for controlling only one lighting device or one ceiling fan, wherein said group code is used for controlling all lighting devices or ceiling fans in the same group, wherein said at least one universal code is used for controlling all lighting devices or ceiling fans.

Referring again to FIG. 11 in view of FIG. 10A and FIG. 10B which illustrates a system flow chart for a method for setting a location code and a group code in accordance to an exemplary embodiment of the present disclosure. The method starts with Step 1 to open the connectivity APP on the mobile phone. Then, Step 2 is to divide the plurality of LED security lights or ceiling fans in the lighting and/or ceiling system into N linkable groups of operating zone with each linkable group comprising at least one member LED light, at least one ceiling fan or both to be individually operating a performance or to be linked for synchronously performing same illumination options, such as, on/off control, dimming control or speed control. The setting of N linkable group is started from a process index i=0. Step 3 is to turn on the at least one LED light or at least one ceiling fan in a first round selection, wherein i=1. Step 4 is thru wireless signal transmitted from a transceiver of the mobile phone to wirelessly connect the connectivity APP to the first round selection of the at least one LED light or the at least one ceiling fan, wherein G(i)=G(1). Step 5 is to display the at least one LED light or the at least one ceiling fan to appear on APP control page of the mobile phone. Step 6 is to assign a location code and a first group code to the first round selection of the at least one LED light or the at least one ceiling fan with the at least one LED light or the at least one ceiling fan being assigned the first group code. Step 7 is for transmitting the first group code thru wireless signal transmitted from the transceiver to the at least one LED light or the at least one ceiling fan in the first round selection, wherein the first group code is received and memorized by a controller, being a microcontroller shown in FIG. 10B, of the at least one LED light or the at least one ceiling fan for coding an outgoing wireless signal and verifying an incoming wireless signal for enabling an individual or a linkable synchronous performance. After completing the setting of the first group code for the first round selection and after checking the process index i≠N, the process resumes to Step 3 for setting a second group code for a second round selection of at least one LED light or at least one ceiling fan thru Step 7. The recurring process continues till all N groups and all LED lights or all ceiling fans have completed settings of relevant location codes for identification and communication. When a plurality of selected member LED lights or member ceiling fans in a linkable group are interlinked, each member LED light or each member ceiling fan installed at different locations around a living area can perform both roles of being a commander as well as being a follower to synchronously perform on/off control, dimming control, speed control or color temperature tuning control.

When each linkable item of said plurality of lights or ceiling fans is designed with a transmittable item code to identify itself, each linkable item may become identifiable by its unique item code on the connectivity APP when connected, a software can be further developed to make each linkable item further controllable on a screen of the connectivity APP. However, it is still missing a location information for each linkable item and therefore a user is still not able to meaningfully make use of such information on the screen of the connectivity APP. A satellite positioned system, such as GPS with map, may be employed to generate a location information for each linkable item shown on the screen of the connectivity APP such that a user can respectively control a functional performance of each linkable item on the connectivity APP. However, it is to be noticed that people tends to control illumination performance in a living space by area not item by item. Therefore, the same process as the above described is still needed and the connectivity APP can be designed with a capacity to divide the plurality of lights or ceiling fans into different linked groups to be respectively assigned a group code. The user may touch on a touch panel displaying the connectivity APP to select the lights or ceiling fans to be linked in each group and push a setting button to wirelessly assign an unique group code to each member light or member ceiling fan in the same group to synchronously operates same illumination performance.

The above mentioned descriptions represent merely the exemplary embodiment of the present disclosure, without any intention to limit the scope of the present disclosure thereto. Various equivalent changes, alternations or modifications based on the claims of present disclosure are all consequently viewed as being embraced by the scope of the present disclosure. 

What is claimed is:
 1. A lifestyle LED security light, comprising at least: a light-emitting unit, including at least a first LED load configured with a plurality of LEDs emitting light with a first color temperature; a loading and power control unit; a light sensing control unit; a motion sensing unit; a time setting unit including a first time setting device and a second time setting device; and a power supply unit; wherein said loading and power control unit comprises a controller and a switching circuitry, wherein said controller is electrically coupled with said light sensing control unit, said motion sensing unit, said switching circuitry and said time setting unit, wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to control and output an electric power to said light-emitting unit, wherein said switching circuitry comprises at least a first semiconductor switching device, wherein said controller outputs a control signal to control a conduction rate of said switching circuitry for delivering different electric powers from said power source to drive said light-emitting unit for generating different illuminations characterized by different light intensities according to signals respectively received from said light sensing control unit and said motion sensing unit; wherein when an ambient light detected by said light sensing control unit is lower than a first predetermined value, said loading and power control unit is activated to switch on said light-emitting unit to perform a first illumination mode to generate a first level illumination for a first predetermined time duration preset by said first time setting device, wherein when a motion intrusion signal is detected by said motion sensing unit, said loading and power control unit responsively operates to increase said conduction rate to increase said electric power delivered to said light-emitting unit to perform a second illumination mode to generate a second level illumination for a second predetermined time duration preset by said second time setting device, wherein said light intensity of said second level illumination is higher than said light intensity of said first level illumination, wherein when said ambient light detected by said light sensing control unit is higher than a second predetermined value, said loading and power control unit is deactivated to switch off said light-emitting unit; wherein said first level illumination is a low level illumination and said second level illumination is a high level illumination, wherein during a performance of said first illumination mode, said low level illumination creates three advantages for performing a lifestyle lighting solution, wherein a first advantage is a creation of an aesthetic night scene when people are outside of a detection area of said motion sensor, wherein a second advantage is the creation of a navigation capacity similar to a light house for guiding people to safely walk to a destination in an outdoor living area, wherein a third advantage is a prevention of a hardship of light being unexpectedly and completely shutoff while a person is still in said detection area due to expiration of a timer and a simple motion by said person can immediately bring said lifestyle LED security light back to said high level illumination; wherein a configuration of said plurality of LEDs of said light-emitting unit is designed with a combination of in series and/or in parallel connections such that when incorporated with a level setting of said DC power, an electric current passing through each LED of said light-emitting unit remains at a level such that a voltage V across each LED complies with an operating constraint of V_(th)<V<V_(max) featuring electrical characteristics of said LED, wherein V_(th) is a threshold voltage required to trigger each LED to start emitting light and V_(max) is a maximum operating voltage across each LED to avoid a thermal damage or burning out of LED construction.
 2. The lifestyle LED security light according to claim 1, wherein said first LED load of said light-emitting unit is configured with a plurality of LEDs electrically connected in series or sets of in parallel connected LEDs electrically connected in series, a working voltage across said light-emitting unit is confined in a domain between a minimum voltage equal to the sum of said threshold voltages of all LEDs electrically connected in series or sets of in parallel connected LEDs electrically connected in series and a maximum voltage equal to the sum of said maximum operating voltages of all LEDs electrically connected in series or sets of in parallel connected LEDs electrically connected in series.
 3. The lifestyle LED security light according to claim 2, wherein said LED has said voltage V across each LED complying with an operating constraint of 2.5 volts<V_(th)<V<V_(max)<3.5 volts and said working voltage imposed on said light-emitting unit represented by V_(N) is confined in domains expressed by N×2.5 volts<V_(N)<N>3.5 volts, wherein N is the number of LEDs electrically connected in series in said first LED load of said light-emitting unit.
 4. The lifestyle LED security light according to claim 1, wherein said power supply unit is configured with an AC/DC power converter to convert an AC power into at least one DC power required for operating said lifestyle LED security light.
 5. The lifestyle LED security light according to claim 1, wherein said power supply unit comprises a battery module to output at least one DC power for operating said lifestyle LED security light.
 6. The lifestyle LED security light according to claim 5, wherein said battery module is a rechargeable battery module.
 7. The lifestyle LED security light according to claim 6, wherein said rechargeable battery module is a solar battery module including a solar panel, a charging circuitry and a rechargeable battery.
 8. The lifestyle LED security light according to claim 1, wherein a wireless remote control device is further installed and is electrically coupled with said controller, wherein said remote control device is configured with a wireless receiver and a wireless transmitter to respectively receive a motion intrusion signal detected from a neighboring lifestyle LED security light and to transmit a motion intrusion signal of self-detection to at least one neighboring lifestyle LED security light; wherein when said motion intrusion signal is detected by said motion sensing unit of said lifestyle LED security light itself, said loading and power control unit responsively operates to perform a motion activated illumination and synchronously operates to transmit said motion intrusion signal thru said wireless transmitter to said at least one neighboring lifestyle LED security light to control a motion activated lighting performance of said at least one neighboring lifestyle LED security light.
 9. The lifestyle LED security light according to claim 8, wherein at least one neighboring LED security light is a single level LED security light, wherein said motion activated lighting performance operated by said at least one neighboring LED security light is a single level illumination; wherein upon receiving said motion intrusion signal from said wireless signal receiver, said at least one neighboring LED security light operates to turn on said light-emitting unit to perform said single level illumination for a predetermined time duration.
 10. The lifestyle LED security light according to claim 8, wherein said at least one neighboring lifestyle LED security light is a two-level LED security light, wherein when said motion intrusion signal detected from said lifestyle LED security light is received by the wireless receiver of said at least one neighboring lifestyle LED security light, said loading and power control unit of said at least one neighboring lifestyle LED security light operates to synchronously increase said conduction rate of said switching device to increase said electric power delivered to said light-emitting unit to perform said second level illumination for said second predetermined time duration.
 11. The lifestyle LED security light according to claim 10, wherein for performing said second level illumination, said loading and power control unit of said at least one neighboring lifestyle LED security light operates the same second conduction rate for generating said second level illumination in the same way as that of said lifestyle LED security light according to said motion intrusion signal from said wireless signal receiver.
 12. The lifestyle LED security light according to claim 10, wherein for performing said second level illumination, said loading and power control unit of said at least one neighboring lifestyle LED security light operates a predetermined second conduction rate for generating said second level illumination.
 13. A linkable lifestyle LED security light, comprising: a light-emitting unit, including at least an LED load configured with a plurality of LEDs emitting light with a color temperature; a loading and power control unit; a light sensing control unit; a motion sensing unit; a wireless remote control device configured with a wireless signal transmitter and a wireless signal receiver; a first time setting device for selecting and setting a first predetermined time duration; a second time setting device for selecting and setting a second predetermined time duration; and a power supply unit; wherein said loading and power control unit comprises a controller and a switching circuitry, wherein said controller is electrically coupled with said light sensing control unit, said motion sensing unit, said switching circuitry, said wireless signal transmitter, said wireless signal receiver, said first time setting device and said second time setting device; wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to control and output an electric power to said light-emitting unit; wherein said switching circuitry comprises at least a first semiconductor switching device, wherein said controller outputs a control signal to control a conduction rate of said switching circuitry for delivering different electric powers from said power source to drive said light-emitting unit for generating different illuminations characterized by different light intensities according to signals respectively received from at least said light sensing control unit, said motion sensing unit and said wireless signal receiver; wherein when an ambient light detected by said light sensing control unit is lower than a first predetermined value, said loading and power control unit is activated to switch on said light-emitting unit to perform a first illumination mode to generate a first level illumination for said first predetermined time duration preset by said first time setting device; wherein when a motion intrusion signal is detected by said motion sensing unit, said loading and power control unit in response manages to perform a second illumination mode to generate a second level illumination for said second predetermined time duration preset by said second time setting device, wherein said light intensity of said second level illumination is higher than said light intensity of said first level illumination; wherein at the same time said loading and power control unit operates to transmit said motion intrusion signal thru said wireless transmitter to wirelessly connect and activate at least one neighboring linkable lifestyle LED security light to synchronously perform said second level illumination for said second predetermined time duration; wherein when said ambient light detected by said light sensing control unit is higher than a second predetermined value, said loading and power control unit operates to switch off said light-emitting unit; wherein said first level illumination is a low level illumination and said second level illumination is a high level illumination, wherein during a performance of said first illumination mode, said low level illumination creates three advantages for performing a lifestyle lighting solution, wherein a first advantage is a creation of an aesthetic night scene when people are outside of a detection area of said motion sensor, wherein a second advantage is the creation of a navigation capacity similar to a light house for guiding people to safely walk to a destination in an outdoor living area, wherein a third advantage is a prevention of a hardship of light being unexpectedly and completely shutoff while a person is still in said detection space due to expiration of a timer and a simple motion by an occupant can immediately bring said linkable lifestyle LED security light back to said high level illumination; wherein a configuration of said plurality of LEDs of said light-emitting unit is designed with a combination of in series and/or in parallel connections such that when incorporated with a level setting of said DC power, an electric current passing through each LED of said light-emitting unit remains at a level such that a voltage V across each LED complies with an operating constraint of V_(th)<V<V_(max) featuring electrical characteristics of said LED, wherein V_(th) is a threshold voltage required to trigger each LED to start emitting light and V_(max) is a maximum operating voltage across each LED to avoid a thermal damage or burning out of LED construction.
 14. The linkable lifestyle LED security light according to claim 13, wherein said LED load of said light-emitting unit is configured with a plurality of LEDs electrically connected in series or sets of in parallel connected LEDs electrically connected in series, a working voltage across said light-emitting unit is confined in a domain between a minimum voltage equal to the sum of said threshold voltages of all LEDs electrically connected in series or sets of in parallel connected LEDs electrically connected in series and a maximum voltage equal to the sum of said maximum operating voltages of all LEDs electrically connected in series or sets of in parallel connected LEDs electrically connected in series.
 15. The linkable lifestyle LED security light according to claim 14, wherein said LED has said voltage V across each LED complying with an operating constraint of 2.5 volts<V_(th)<V<V_(max)<3.5 volts and said working voltage imposed on said light-emitting unit represented by V_(N) is confined in domains expressed by N×2.5 volts<V_(N)<N×3.5 volts, wherein N is the number of LEDs electrically connected in series in said first LED load of said light-emitting unit.
 16. The linkable lifestyle LED security light according to claim 13, wherein said power supply unit is configured with an AC/DC power converter to convert an AC power into at least one DC power required for operating said linkable lifestyle LED security light.
 17. The linkable lifestyle LED security light according to claim 13, wherein said power supply unit comprises a battery module to output at least one DC power for operating said linkable lifestyle LED security light.
 18. The linkable lifestyle LED security light according to claim 17, wherein said battery module is a rechargeable battery module.
 19. The linkable lifestyle LED security light according to claim 18, wherein said rechargeable battery module is a solar battery module including a solar panel, a charging circuitry and a rechargeable battery.
 20. The linkable lifestyle LED security light according to claim 13, wherein said wireless signal for operating said wireless remote control device is a Wi-Fi wireless signal, a Blue Tooth wireless signal, a Zig Bee wireless signal, or a radio frequency wireless signal.
 21. The linkable lifestyle LED security light according to claim 13, wherein said first time setting device is designed to include a dusk to dawn option, wherein said first predetermined time duration is ended at dawn when said ambient light is higher than a second predetermined value to perform a dusk to dawn illumination of said low level illumination.
 22. A linkable LED security lighting system, configured with a plurality of LED security lights with each LED security light comprising at least: a light-emitting unit, including at least a first LED load emitting light with a first color temperature; a switching circuitry; a controller; a light sensing control unit; a motion sensing unit; a wireless signal transmitter a wireless signal receiver; a first external control device; a second external control device; a first time setting device; and a second time setting device; wherein said controller is electrically coupled with said switching circuitry; wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to transmit different electric powers to said light-emitting unit for operating different illumination modes controlled by said controller according to signals respectively received from said light sensing control unit, said motion sensing unit, said wireless signal receiver, said first external control device, said second external control device, said first time setting device and said second time setting device; wherein, for each LED security light, at dusk when an ambient light detected by said light sensing control unit is lower than a first predetermined value, said controller operates to output a first control signal to conduct said switching circuitry with a first conduction rate according to an operating parameter preset with said first external control device to operate a low level illumination mode for performing a low level illumination for a first time length according to an operating parameter preset with said first time setting device; wherein said controller is designed with a process to activate a high level illumination mode to perform a high level illumination preset with said second external control device upon receiving a motion signal detected by said motion sensing unit or upon receiving a wireless signal thru said wireless signal receiver whichever occurs first, wherein during said low level illumination mode when said controller of an LED security light first receives said motion signal, said LED security light acts as a commanding LED security light to activate said plurality of LED security lights to synchronously operate said high level illumination mode to perform said high level illumination; wherein upon receiving said motion signal said controller of said commanding LED security light operates to output a second control signal to activate said high level illumination mode to perform said high level illumination for a second time length preset with said second time setting device, at the same time said controller of said commanding LED security light operates to transmit said wireless signal thru said wireless signal transmitter of said commanding LED security light to remotely activate said at least one neighboring member LED security light in said linkable LED security lighting system to synchronously operate said high level illumination mode for performing said high level illumination, wherein upon a maturity of said second time length with no new motion signal being further received said controller of said LED security light operates to resume said low level illumination; wherein at dawn when said ambient light detected by said light sensing control unit is higher than a second predetermined value, said controller operates to cutoff said switching circuitry to turn off said LED security light in said linkable LED security lighting system; wherein said first LED load in conjunction with a level setting of said DC power is designed with an adequate combination of said plurality of LEDs in series and/or in parallel connections such that an electric current passing through each LED of said first LED load remains at an adequate level, and a voltage V across each LED complies with a constraint of V_(th)<V<V_(max) featuring electrical characteristics of said LED; wherein V_(th) is a threshold voltage required to trigger said LED to start emitting light and V_(max) is a maximum operating voltage across said LED to avoid a thermal damage to LED construction.
 23. The linkable LED security lighting system according to claim 22, wherein when said first LED load is configured with LEDs or sets of in parallel connected LEDs electrically connected in series, a working voltage across said LED load is confined in a domain between a minimum voltage equal to the total sum of said threshold voltages of respective said LEDs or said sets of in parallel connected LEDs electrically connected in series and a maximum voltage equal to the total sum of said maximum operating voltages of respective said LEDs or said sets of in parallel connected LEDs electrically connected in series, namely N×V_(th)<V_(N)<N×V_(max), wherein N is an integral representing the number of said LEDs or said sets of in parallel connected LEDs electrically connected in series and V_(N) is said working voltage across said LED load.
 24. The linkable LED security lighting system according to claim 23, wherein when the LED load is configured with white LEDs, V_(th)=2.5 volts and V_(max)=3.5 volts, therefore V_(N) is to be confined in a domain between N×2.5 volts and N×3.5 volts, namely N×2.5 volts<V_(N)<N×3.5 volts.
 25. The linkable LED security lighting system according to claim 22, wherein in each LED security light a first switch is electrically installed between said wireless signal transmitter and said controller to connect or disconnect said wireless signal transmitter to said controller, and a second switch is electrically installed between said wireless signal receiver and said controller to connect or disconnect said wireless signal receiver to said controller; wherein when both said first switch and said second switch are in a connected state, said LED security light is linkable to at east one neighboring LED security light; wherein when both said first selection switch and said second selection switch are in a disconnected state, said LED security light is not linkable to any of said neighboring LED security lights and said LED security light is independently operated.
 26. The linkable LED security lighting system according to claim 22, wherein said first external control device, said second external control device, said first time setting device and said second time setting device are voltage dividers to respectively output different voltage signals interpretable by said controller for selecting and setting operating parameters of said LED security light.
 27. The linkable LED security lighting system according to claim 22, wherein said first time setting device is designed to include a dusk to dawn option, wherein said first time length is ended at dawn when said ambient light detected is higher than a second predetermined value to perform a dusk to dawn illumination of said low level illumination.
 28. The linkable LED security lighting system according to claim 22, wherein when said at least one neighboring LED security light is remotely and wirelessly activated to operate said high level illumination mode for performing said high level illumination, said controller of said at least one neighboring LED security light operates to conduct said switching circuitry according to said wireless signal received from said wireless signal receiver to perform same said high level illumination for same said second time length performed by said commanding LED security light.
 29. The linkable LED security lighting system according to claim 22, wherein when said at least one neighboring LED security light is remotely and wirelessly activated to operate said high level illumination mode for performing said high level illumination, said controller of said at least one neighboring LED security light manages to perform said high level illumination according to said operating parameter preset.
 30. The linkable LED security lighting system according to claim 22, wherein said controller is further designed to operate a general illumination mode; wherein a short power interruption circuitry is electrically coupled to said controller for detecting a short power interruption signal generated by operating a power switch to turn off and turn back on a power input to said LED security light within a preset short time interval; wherein a third external control device and a third time setting device are electrically coupled with said controller; wherein when said controller of an LED security light first receives said short power interruption signal, said controller operates to deactivate said motion sensing unit and activates said general illumination mode; wherein said controller outputs a third control signal to conduct said switching circuitry to transmit an electric power to said light-emitting unit according to an operating parameter preset with said third external control device for said third time length preset with said third time setting device for operating said general illumination mode for performing a general illumination, wherein said controller simultaneously operates to wirelessly link at least one neighboring LED security light thru said wireless signal transmitter to synchronously activate said at least one neighboring LED security light to operate said general illumination mode for performing said general illumination.
 31. The linkable LED security lighting system according to claim 30, wherein said third time length is designed to be ended at dawn when said ambient light detected by said light sensing control unit is higher than a second predetermined value.
 32. A linkable LED security lighting system, configured with a plurality of LED security lights with each LED security light comprising at least: a light-emitting unit, including at least a first LED load emitting light with a first color temperature; a switching circuitry; a controller; a light sensing control unit; a motion sensing unit; a wireless signal transmitter; a wireless signal receiver; a first external control device; a second external control device; a first time setting device; and a second time setting device; wherein said controller is electrically coupled with said switching circuitry; wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to transmit different electric powers to said light-emitting unit for operating different illumination modes controlled by said controller according to signals respectively received from said light sensing control unit, said motion sensing unit, said wireless signal receiver, said first external control device, said second external control device, said first time setting device and said second time setting device; wherein at dusk when a nighttime signal is detected thru said light sensing control unit indicating an ambient light being lower than a first predetermined value, said controller operates to output a first control signal to conduct said switching circuitry with a first conduction rate according to an operating parameter preset with said first external control device to operate a low level illumination mode for performing a low level illumination for a first time length preset by said first time setting device; wherein said controller is designed to operate said low level illumination mode either according to a night time signal being detected or according to a detection of a first wireless signal from said wireless signal receiver whichever occurs first; wherein at dusk when said controller of an LED security light in said linkable LED security lighting system first detects said nighttime signal thru said light sensing control unit, said LED security light acts as a commanding LED security light to synchronously activate said plurality of LED security lights to operate said low level illumination mode to perform said low level illumination; wherein said controller operates to activate said low level illumination mode and at the same time said controller operates to wirelessly transmit said first wireless signal thru said wireless signal transmitter to activate said at least one neighboring LED security light to synchronously operate said low level illumination mode for performing said low level illumination for said first time length; wherein during a performance of said low level illumination mode when said controller of an LED security light in said linkable LED security lighting system first detects a motion signal from said motion sensing unit, said LED security light acts as a commanding LED security light to activate said plurality of LED security lights to synchronously operate a high level illumination mode to perform a high level illumination for a second time length preset by said second time setting device; wherein said controller of said commanding LED security light operates to output a second control signal to activate said high level illumination mode to perform said high level illumination preset by said second external control device, at the same time said controller operates to wirelessly transmit a second wireless signal thru said wireless signal transmitter to activate said at least one neighboring LED security light to synchronously operate said high level illumination mode for performing said high level illumination for said second time length, wherein upon a maturity of said second time length with no new motion signal being further detected said controller operates said LED security light to resume said low level illumination mode to perform said low level illumination; wherein at dawn when an LED security light in said linkable LED security lighting system first detects a daytime signal indicating said ambient light detected thru said light sensing control unit being higher than a second predetermined value, said LED security light acts as a commanding LED security light to synchronously deactivate said plurality of LED security lights in said linkable LED security lighting system, wherein said controller of said LED security light operates to stop outputting said first control signal and said second control signal to turn off said light-emitting unit, at the same time said controller operates to wirelessly transmit a third wireless signal thru said wireless signal transmitter to deactivate said at least one neighboring LED security light to turn off said light-emitting unit of said at least one neighboring LED security light; wherein said first LED load in conjunction with a level setting of said DC power is designed with an adequate combination of said plurality of LEDs in series and/or in parallel connections such that an electric current passing through each LED of said LED load remains at an adequate level, and a voltage V across each LED complies with a constraint of V_(th)<V<V_(max) featuring electrical characteristics of said LED; wherein V_(th) is a threshold voltage required to trigger said LED to start emitting light and V_(max) is a maximum operating voltage across said LED to avoid a thermal damage to LED construction.
 33. The linkable LED security lighting system according to claim 32, wherein when said first LED load is configured with LEDs or sets of in parallel connected LEDs electrically connected in series, a working voltage across said LED load is confined in a domain between a minimum voltage equal to the total sum of said threshold voltages of respective said LEDs or said sets of in parallel connected LEDs electrically connected in series and a maximum voltage equal to the total sum of said maximum operating voltages of respective said LEDs or said sets of in parallel connected LEDs electrically connected in series, namely N×V_(th)<V_(N)<N×V_(max), wherein N is an integral representing the number of said LEDs or said sets of in parallel connected LEDs electrically connected in series and V_(N) is said working voltage across said LED load.
 34. The linkable LED security lighting system according to claim 33, wherein when the LED load is configured with white LEDs, V_(th)=2.5 volts and V_(max)=3.5 volts, therefore V_(N) is to be confined in a domain between N×2.5 volts and N×3.5 volts, namely N×2.5 volts<V_(N)<N×3.5 volts.
 35. The linkable LED security lighting system according to claim 32, wherein a first switch is electrically installed between said wireless signal transmitter and said controller to connect or disconnect said wireless signal transmitter to said controller, and a second switch is electrically installed between said wireless signal receiver and said controller to connect or disconnect said wireless signal receiver to said controller; wherein when both said first switch and said second switch are in a connected state, said LED security light is linkable to at least one neighboring LED security light; wherein when both said first selection switch and said second selection switch are in a disconnected state, said LED security light is not linkable to any of said neighboring LED security lights and said LED is independently operated.
 36. The linkable LED security lighting system according to claim 32, wherein said first external control device, said second external control device, said first time setting device and said second time setting device are voltage dividers to respectively output different voltage signals interpretable by said controller for selecting and setting operating parameters of said first conduction rate, said second conduction rate, said first time length and said second time length.
 37. The linkable LED security lighting system according to claim 32, wherein said first time length is designed to be ended at dawn when an ambient light detected by said light sensing control unit is higher than said second predetermined value to perform a dusk to dawn illumination of said low level illumination.
 38. The linkable LED security lighting system according to claim 32, wherein said controller is further designed to operate a general illumination mode; wherein a short power interruption circuitry is electrically coupled to said controller for detecting a short power interruption signal generated by operating a power switch to turn off and turn back on a power input to said LED security light within a preset short time interval; wherein a third external control device and a third time setting device are electrically coupled with said controller; wherein when said controller of an LED security light first receives said short power interruption signal, said controller operates to deactivate said motion sensing unit and activates said general illumination mode; wherein said controller output a third control signal to conduct said controllable switching circuitry to transmit an electric power to said light-emitting unit according to an operating parameter preset with said third external control device for said third time length preset with said third time setting device for operating said general illumination mode for performing a general illumination, wherein said controller simultaneously operates to wirelessly link at least one neighboring LED security light thru said wireless signal transmitter to synchronously activate said at least one neighboring LED security light to operate said general illumination mode for performing said general illumination.
 39. The linkable LED security lighting system according to claim 38, wherein said third time length is designed to be ended at dawn when said ambient light detected by said light sensing control unit is higher than said second predetermined value.
 40. A linkable LED security lighting system, configured with a plurality of LED security lights with each LED security light comprising: a light-emitting unit, configured with an LED load; a switching circuitry, electrically connected between a power source and said light-emitting unit for delivering at least one DC power to said light-emitting unit, for performing at least a first level illumination; a controller, designed to operate at least a first illumination mode; wherein said controller outputs a first control signal to conduct said switching circuitry with a first conduction rate to deliver a first electric power to said light-emitting unit to perform said first level illumination; a light sensing control unit, electrically coupled to said controller for detecting an ambient light level and accordingly outputting a nighttime signal or a daytime signal; a wireless signal transmitter, electrically coupled to said controller to wirelessly transmit a first wireless signal to synchronously control at least one neighboring LED security light to activate said first illumination mode to perform the first level illumination and to wirelessly transmit a second wireless signal to synchronously deactivate said first illumination mode to turn off said first level illumination; and a wireless signal receiver, electrically coupled to said controller for receiving said first wireless signal to synchronously activate said first illumination mode to perform said first level illumination and for receiving said second wireless signal to turn off said first level illumination; wherein at dusk when said controller of an LED security light of said plurality of LED security lights first detects said nighttime signal, said LED security light acts as a commanding LED security light to synchronously activate said plurality of LED security lights to perform said first level illumination, wherein said controller of said commanding LED security light operates to output said first control signal to conduct said switching circuitry with said first conduction rate to perform said first level illumination, at the same time said controller of said commanding LED security light operates to transmit said first wireless signal to said at least one neighboring LED security light thru said wireless signal transmitter to synchronously activate said at least one neighboring LED security light to perform said first level illumination; wherein at dawn when an LED security light in said linkable LED security lighting system first detects said daytime signal, said controller of said LED security light acts as a commanding LED security light to synchronously deactivate said plurality of LED security lights to turn off said first level illumination; wherein said controller of said commanding LED security light operates to deactivate said first level illumination mode to turn off said first level illumination, at the same time said controller of said commanding LED security light operates to transmit said second wireless signal to said at least one neighboring LED security light thru said wireless signal transmitter to synchronously deactivate said first illumination mode and turn off said first level illumination of said at least one neighboring LED security light; wherein said LED load in conjunction with a level setting of said DC power is designed with an adequate combination of said plurality of LEDs in series and/or in parallel connections such that an electric current passing through each LED of said LED load remains at an adequate level, and a voltage V across each LED complies with a constraint of V_(th)<V<V_(max) featuring electrical characteristics of said LED; wherein V_(th) is a threshold voltage required to trigger said LED to start emitting light and V_(max) is a maximum operating voltage across said LED to avoid a thermal damage to LED construction.
 41. The linkable LED security lighting system according to claim 40, wherein when said first LED load is configured with LEDs or sets of in parallel connected LEDs electrically connected in series, a working voltage across said LED load is confined in a domain between a minimum voltage equal to the total sum of said threshold voltages of respective said LEDs or said sets of in parallel connected LEDs electrically connected in series and a maximum voltage equal to the total sum of said maximum operating voltages of respective said LEDs or said sets of in parallel connected LEDs electrically connected in series, namely N×V_(th)<V_(N)<N×V_(max), wherein N is an integral representing the number of said LEDs or said sets of in parallel connected LEDs electrically connected in series and V_(N) is said working voltage across said LED load.
 42. The linkable LED security lighting system according to claim 41, wherein When the LED load is configured with white LEDs, V_(th)=2.5 volts and V_(max)=3.5 volts, therefore V_(N) is to be confined in a domain between N×2.5 volts and N×3.5 volts, namely N×2.5 volts<V_(N)<N×3.5 volts.
 43. An APP based linkable security lighting system, configured with a plurality of LED security lights with each LED security light comprising: a light-emitting unit, including an LED load; a switching circuitry; a controller; a light sensing control unit, electrically coupled to said controller for detecting an ambient light level and accordingly outputting a nighttime signal or a daytime signal; a motion sensing unit; a wireless signal transmitter, electrically coupled to said controller to transmit wireless signals prefixed with identification codes including a first instruction signal, a second instruction signal and a third instruction signal for communications in said APP based linkable security lighting system; a wireless signal receiver, electrically coupled to said controller for receiving said wireless signals prefixed with identification codes including said first instruction signal, said second instruction signal and said third instruction signal for communications in said APP based linkable security lighting system; a first time setting device; and a second time setting device; wherein said controller is electrically coupled with said switching circuitry; wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to transmit different electric powers to said light-emitting unit for operating different illumination modes controlled by said controller according to signals respectively received from said light sensing control unit, said motion sensing unit, said wireless signal receiver, said first time setting device and said second time setting device; wherein a connectivity APP is designed and loaded in a mobile device, wherein said connectivity APP is configured with two operating processes, wherein a first operating process is to establish a data base of installed locations for all of said plurality of LED security lights with each of said plurality of LED security lights being assigned a location code for identification and for individual control, wherein a second operating process is a grouping job to divide said plurality of LED security lights into at least one group of linkable LED security lights with each group being assigned a group code applicable to each LED security light in the same group for identification and for synchronously performing same illumination; wherein said connectivity APP is wirelessly connected with each LED security light of said plurality LED security lights for generating, assigning, receiving, setting and recording at least a location code, at least a group code and/or at least one universal code to each LED security light of said plurality of LED security lights, wherein said location code, said group code and/or said at least one universal code are stored in a memory unit of said controller of each LED security light, wherein after said data base of installed locations for said plurality of LED security lights being fully established each LED security light displayed visually on a screen of said mobile device becomes identifiable on said connectivity APP to a user to perform a grouping or re-grouping job, wherein said location code is used for controlling only one LED security light, wherein said group code is used for synchronously controlling all LED security lights in the same group, wherein said at least one universal code is used for synchronously controlling all LED security lights; wherein said controller is designed with a software program to verify said wireless signals received from said wireless signal receiver, wherein if said wireless signal prefixed with an identification code is identical to one of said location code, said group code or said at least one universal code in said memory unit, said controller operates to process said wireless signal to activate a corresponding illumination performance according to said wireless signal being said first instruction signal, said second instruction signal or said third instruction signal; wherein said controller is designed to activate said LED security light either according to a nighttime signal being detected by said light sensing control unit or according to said first instruction signal received from said wireless signal receiver whichever occurs first; wherein at dusk when said controller of an LED security light first detects said nighttime signal thru said light sensing control unit, said LED security light acts as a commanding LED security light to synchronously activate said plurality of LED security lights to operate a low level illumination mode to perform a low level illumination for a first time length preset by said first time setting device; wherein said controller of said commanding LED security light operates to activate said low level illumination mode and said motion sensing unit, at the same time said controller of said commanding LED security light operates to wirelessly transmit said first instruction signal with a first universal code to all neighboring LED security lights thru said wireless signal transmitter to activate all neighboring LED security lights to synchronously operate said low level illumination mode for performing said low level illumination for said first time length; wherein during a performance of said low level illumination mode when said controller of an LED security light first detects a motion signal thru said motion sensing unit, said LED security light acts as a commanding LED security light to activate said LED security lights in a linkable group to synchronously operate a high level illumination mode to perform a high level illumination for a second time length preset by said second time setting device; wherein said controller of said commanding LED security light operates to activate said high level illumination mode to perform said high level illumination, at the same time said controller of said commanding LED security light operates to wirelessly transmit said second instruction signal with said group code to activate at least one neighboring LED security light to synchronously operate said high level illumination mode for performing said high level illumination for said second time length, wherein upon a maturity of said second time length with no new motion signal or said second instruction signal being further detected said controller operates to resume said low level illumination mode; wherein at dawn when said controller of an LED security light in said APP based linkable security lighting system first receives said daytime signal from said light sensing control unit, said LED security light acts as a commanding LED security light to synchronously deactivate said plurality of LED security lights, wherein said controller of said commanding LED security light operates to turn off said light-emitting unit, at the same time said controller operates to wirelessly transmit said third instruction signal with a second universal code identifiable and executable by all neighboring LED security lights thru said wireless signal transmitter to deactivate and turn off all neighboring LED security lights.
 44. The APP based linkable security lighting system according to claim 43, wherein said first time length is designed to be ended at dawn when said ambient light detected is higher than a second predetermined value to perform a dusk to dawn illumination of said low level illumination.
 45. The APP based linkable security lighting system according to claim 43, wherein said controller is further designed to operate a general illumination mode; wherein a short power interruption circuitry is electrically coupled to said controller for detecting a short power interruption signal generated by operating a power switch to turn off and turn back on a power input to said LED security light within a preset short time interval; wherein a third time setting device is electrically coupled with said controller; wherein when said controller of an LED security light first receives said short power interruption signal, said controller operates to deactivate said motion sensing unit and activates said general illumination mode; wherein said controller controls an electric power transmitting to said light-emitting unit for a third time length preset with said third time setting device for operating said general illumination mode for performing a general illumination, wherein said controller simultaneously operates to wirelessly link at least one neighboring LED security light thru said wireless signal transmitter to synchronously activate said at least one neighboring LED security light to operate said general illumination mode for performing said general illumination.
 46. The APP based linkable security lighting system according to claim 43, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by individually connecting each LED security of said plurality of LED security lights to said connectivity APP by turns such that each LED security light is assigned a different location code to form said data base of installed locations.
 47. The APP based linkable security lighting system according to claim 43, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by using a map utilizing GPS or similar satellite position systems to locate each LED security light to form said data base of installed locations.
 48. An APP based linkable security lighting system, configured with a plurality of LED security lights with each LED security light comprising: a light-emitting unit, including an LED load; a switching circuitry; a controller; a light sensing control unit, electrically coupled to said controller for detecting an ambient light level and accordingly outputting a nighttime signal or a daytime signal; a motion sensing unit; a wireless signal transmitter, electrically coupled to said controller to transmit wireless signals prefixed with identification codes including a first instruction signal, a second instruction signal and a third instruction signal for communications in said APP based linkable security lighting system; a wireless signal receiver, electrically coupled to said controller for receiving said wireless signals prefixed with identification codes including said first instruction signal, said second instruction signal and said third instruction signal for communications in said APP based linkable security lighting system; and a time setting device; wherein said controller is electrically coupled with said switching circuitry; wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to transmit different electric powers to said light-emitting unit for operating different illumination modes controlled by said controller according to signals respectively received from said light sensing control unit, said motion sensing unit, said wireless signal receiver, and said time setting device; wherein a connectivity APP is designed and loaded in a mobile device, wherein said connectivity APP is configured with two operating processes, wherein a first operating process is to establish a data base of installed locations for all of said plurality of LED security lights with each of said plurality of LED security lights being assigned a location code for identification and for individual control, wherein a second operating process is a grouping job to divide said plurality of LED security lights into at least one group of linkable LED security lights with each group being assigned a group code applicable to each LED security light in the same group for identification and for synchronously performing same illumination; wherein said connectivity APP is wirelessly connected with each LED security light of said plurality LED security lights for generating, assigning, receiving, setting and recording at least a location code, at least a group code and/or at least one universal code to each LED security light of said plurality of LED security lights, wherein said location code, said group code and/or said at least one universal code are stored in a memory unit of said controller of each LED security light, wherein after said data base of installed locations for said plurality of LED security lights being fully established each LED security light displayed visually on a screen of said mobile device becomes identifiable on said connectivity APP to a user to perform a grouping or re-grouping job, wherein said location code is used for controlling only one LED security light, wherein said group code is used for synchronously controlling all LED security lights in the same group, wherein said at least one universal code is used for synchronously controlling all LED security lights; wherein said controller is designed with a software program to verify said wireless signals received from said wireless signal receiver, wherein if said wireless signal prefixed with an identification code is identical to one of said location code, said group code or said at least one universal code in said memory unit, said controller operates to process said wireless signal to activate a corresponding illumination performance according to said wireless signal being said first instruction signal, said second instruction signal or said third instruction signal; wherein said controller is designed to activate said LED security light either according to a nighttime signal being detected or according to a detection of said first instruction signal from said wireless signal receiver whichever occurs first; wherein at dusk when said controller of an LED security light in a linkable group first detects said nighttime signal thru said light sensing control unit, said LED security light acts as a commanding LED security light to synchronously activate said plurality of LED security lights to operate a motion detection mode; wherein said controller operates to activate said motion sensing unit of said commanding LED security light to operate said motion detection mode, and at the same time said controller operates to wirelessly transmit said first instruction signal with a first universal code to said controllers of all neighboring LED security lights thru said wireless signal transmitter to activate each neighboring LED security light to operate said motion detection mode; wherein whenever said motion detection mode is activated, if said controller of an LED security light of a linkable group first detects a motion signal, said LED security light acts as a commanding LED security light to activate said LED security lights in said linkable group to synchronously operate a high level illumination mode to perform a high level illumination; wherein said controller of said commanding LED security light operates to activate said high level illumination mode to perform said high level illumination, at the same time said controller of said commanding LED security light operates to wirelessly transmit said second instruction signal with said group code identifiable and executable by said controller of at least one neighboring LED security light to synchronously operate said high level illumination mode for performing said high level illumination for a time length; wherein upon a maturity of said time length with no new motion signal or said second instruction signal being further detected said controller operates said LED security light to resume said motion detection mode; wherein at dawn when said controller of an LED security light in said APP based linkable security lighting system first detects said daytime signal thru said light sensing control unit, said LED security light acts as a commanding LED security light to synchronously deactivate said plurality of LED security lights, wherein said controller of said commanding LED security light operates to turn off said light-emitting unit, at the same time said controller operates to wirelessly transmit said third instruction signal with a second universal code identifiable and executable by said controller of each neighboring LED security light thru said wireless signal transmitter to deactivate each neighboring LED security light to turn off said light-emitting unit.
 49. The APP based linkable security lighting system according to claim 48, wherein said controller is further designed to operate a general illumination mode; wherein a short power interruption circuitry is electrically coupled to said controller for detecting a short power interruption signal generated by operating a power switch to turn off and turn back on a power input to said LED security light within a preset short time interval; wherein a third time setting device is electrically coupled with said controller; wherein when said controller of an LED security light first receives said short power interruption signal, said controller operates to deactivate said motion sensing unit and activates said general illumination mode; wherein said controller controls an electric power transmitting to said light-emitting unit for a third time length preset with said third time setting device for operating said general illumination mode for performing a general illumination, wherein said controller simultaneously operates to wirelessly link at least one neighboring LED security light thru said wireless signal transmitter to synchronously activate said at least one neighboring LED security light to operate said general illumination mode for performing said general illumination.
 50. The APP based linkable security lighting system according to claim 48, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by individually connecting each LED security of said plurality of LED security lights to said connectivity APP by turns such that each LED security light is assigned a different location code to form said data base of installed locations.
 51. The APP based linkable security lighting system according to claim 48, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by using a map utilizing GPS or similar satellite position systems to locate each LED security light to form said data base of installed locations.
 52. An APP based linkable security lighting system, configured with a plurality of LED security lights with each LED security light comprising: a light-emitting unit, including an LED load; a switching circuitry; a controller; a light sensing control unit, electrically coupled to said controller for detecting an ambient light level and accordingly outputting a nighttime signal or a daytime signal; a motion sensing unit; a wireless signal transmitter, electrically coupled to said controller to transmit an instruction signal prefixed with an identification code for communications in said APP based linkable security lighting system; a wireless signal receiver, electrically coupled to said controller for receiving said instruction signal prefixed with said identification code for communications in said APP based linkable security lighting system; and a time setting device; wherein said controller is electrically coupled with said switching circuitry; wherein said switching circuitry is electrically connected between a power source and said light-emitting unit to transmit an electric power to said light-emitting unit for operating at least one illumination mode controlled by said controller according to signals respectively received from said light sensing control unit, said motion sensing unit, said wireless signal receiver, and said time setting device; wherein a connectivity APP is designed and loaded in a mobile device, wherein said connectivity APP is configured with two operating processes, wherein a first operating process is to establish a data base of installed locations for all of said plurality of LED security lights with each of said plurality of LED security lights being assigned a location code for identification and for individual control, wherein a second operating process is a grouping job to divide said plurality of LED security lights into at least one group of linkable LED security lights with each group being assigned a group code applicable to each LED security light in the same group for identification and for synchronously performing same illumination; wherein said connectivity APP is wirelessly connected with each LED security light of said plurality LED security lights for generating, assigning, receiving, setting and recording at least a location code, at least a group code and/or at least one universal code to each LED security light of said plurality of LED security lights, wherein said location code, said group code and/or said at least one universal code are stored in a memory unit of said controller of each LED security light for verification and identification, wherein after said data base of installed locations for said plurality of LED security lights being fully established each LED security light displayed visually on a screen of said mobile device becomes identifiable on said connectivity APP to a user to perform a grouping or re-grouping job; wherein said location code is used for controlling only one LED security light, wherein said group code is used for controlling all LED security lights in the same group, wherein said at least one universal code is used for controlling all LED security lights; wherein said controller is designed with a software program to verify said instruction signal received from said wireless signal receiver, wherein if said identification code of said instruction signal is identical to one of said location code, said group code or said at least one universal code in said memory unit, said controller operates to process said instruction signal to activate a corresponding illumination performance according to said instruction signal; wherein said controller is designed to activate said LED security light either according to a motion signal being detected thru said motion sensing unit or according to a detection of said instruction signal from said wireless signal receiver whichever occurs first; wherein at dusk when said controller of said LED security light detects said nighttime signal thru said light sensing control unit, said controller activates said motion sensing unit to operate a motion sensing mode; wherein at dawn when said controller detects said daytime signal thru said light sensing control unit, said controller operates to deactivate said motion sensing unit to turn off said light-emitting unit; wherein when said controller of an LED security light in a linkable group first detects a motion signal thru said motion sensing unit, said LED security light acts as a commanding LED security light to synchronously activate said LED security lights in a linkable group to operate a high level illumination mode; wherein said controller operates to activate said high level illumination mode of said commanding LED security light to perform a high level illumination for a time length preset by said time setting device and at the same time said controller operates to wirelessly transmit said instruction signal with said group code identifiable and executable by said controller of all neighboring LED security lights thru said wireless signal transmitter to synchronously operate said high level illumination mode to perform said high level illumination for said time length, wherein upon a maturity of said time length with no new motion signal or said instruction signal being further detected, said controller operates to terminate said high level illumination and accordingly all LED security lights are switched to resume said motion detection mode; wherein at dawn when said controller of said LED security light detects said daytime signal thru said light sensing control unit, said controller operates to terminate said motion detection mode to deactivate said LED security light.
 53. The APP based linkable security lighting system according to claim 52, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by individually connecting each LED security of said plurality of LED security lights to said connectivity APP by turns such that each LED security light is assigned a different location code to form said data base of installed locations.
 54. The APP based linkable security lighting system according to claim 52, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by using a map utilizing GPS or similar satellite position systems to locate each LED security light to form said data base of installed locations.
 55. An APP based setting method, for establishing a linkable LED security lighting system configured with a plurality of LED security lights comprising: using a connectivity APP designed and loaded in a mobile device to perform two operating processes including a first operating process for generating a data base of installed locations for all of said plurality of LED security lights with each of said plurality of LED security lights being assigned a location code for identification and for individual performance control, and a second operating process for performing a grouping job to divide said plurality of LED security lights into at least one group of linkable LED security lights with each group being assigned a group code applicable to each LED security light in the same group for identification and for synchronously performing same illumination; wherein said connectivity APP is wirelessly connected with each LED security light of said plurality LED security lights for generating, assigning, receiving, setting and recording at least a location code, at least a group code and/or at least one universal code to each LED security light of said plurality of LED security lights, wherein said location code, said group code and/or said at least one universal code are stored in a memory unit of each LED security light, wherein after said data base of installed locations for said plurality of LED security lights being fully established each LED security light displayed visually on a screen of said mobile device becomes identifiable on said connectivity APP to a user to perform a grouping or re-grouping job; using a controller electrically coupled with a switching circuitry electrically connected between a power source and an LED load in each LED security light, to operate at least a high level illumination mode; wherein for activating said high level illumination mode said controller outputs a control signal to control said switching circuitry to deliver a high level electric power to said LED load for performing a high level illumination for a time length; using a software program designed in said controller of each LED security light to receive, process and memorize in a memory unit at least one setting signal wirelessly transmitted from said mobile device generated by said connectivity APP to be used for identifying and verifying an instruction signal from a neighboring LED security light to responsively and synchronously operate same illumination being performed by said neighboring LED security light; using a light sensing control unit electrically coupled with said controller to detect an ambient light level and accordingly outputting a nighttime signal or a daytime signal; using a motion sensing unit electrically coupled with said controller to detect a motion signal; using a wireless signal transmitter electrically coupled with said controller to wirelessly transmit an instruction signal with said group code identifiable and executable by said controller of each neighboring LED security light to synchronously operate same illumination performance; using a wireless signal receiver, electrically coupled to said controller for receiving at least two types of wireless external control signals, wherein a first type of wireless external control signal is a location code setting signal or a group code setting signal generated by and transmitted from said connectivity APP of said mobile device to be processed and memorized in said memory unit by said controller of each LED security light; wherein a second type of wireless external control signal is said instruction signal with said group code transmitted from at least one neighboring LED security light identifiable and executable by said controller for operating the same illumination mode being operated by said at least one neighboring LED security light; wherein at dusk when said controller of said LED security light detects said nighttime signal thru said light sensing control unit, said controller activates said motion sensing unit to operate a motion sensing mode to perform a motion detection; wherein at dawn when said controller detects said daytime signal thru said light sensing control unit, said controller operates to deactivate said motion sensing unit to turn off said light-emitting unit; wherein when said controller of an LED security light first detects said motion signal thru said motion sensing unit, said LED security light acts as a commanding LED security light to synchronously activate said LED security lights in a linkable group to operate said high level illumination mode to perform said high level illumination for said time length; wherein said controller operates to activate said high level illumination mode of said commanding LED security light to perform said high level illumination for said time length and at the same time said controller operates to wirelessly transmit said instruction signal with said group code identifiable and executable by said controller of all neighboring LED security lights thru said wireless signal transmitter to synchronously operate said high level illumination mode to perform said high level illumination for said time length; wherein upon a maturity of said time length with no new motion signal or said instruction signal being further detected, said controller operates to terminate said high level illumination mode and accordingly all LED security lights are switched to resume said motion sensing mode; wherein at dawn when said controller of said LED security light detects said daytime signal thru said light sensing control unit, said controller operates to terminate said motion sensing mode to deactivate said LED security light.
 56. The APP based setting method according to claim 55, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by individually connecting each LED security of said plurality of LED security lights to said connectivity APP by turns such that each LED security light is assigned a different location code to form said data base of installed locations.
 57. The APP based setting method according to claim 55, wherein said first operating process for generating said data base of installed locations for said plurality of LED security lights is implemented by using a map utilizing GPS or similar satellite position systems to locate each LED security light to form said data base of installed locations.
 58. An APP based setting method, for wirelessly selecting and exclusively controlling a functional performance of a lighting device or a group of selected lighting devices among a plurality of lighting devices comprising: using a connectivity APP designed and loaded in a mobile device to perform two operating processes including a first operating process for generating a data base of installed locations for all of said plurality of lighting devices with each of said plurality of lighting devices being assigned a location code for identification and for individual performance control, and a second operating process for performing a grouping job to establish at least one group of linkable lighting devices with said at least one group of linkable lighting devices being assigned a group code applicable to each lighting device in said at least one group for identification and for synchronously performing same illumination; wherein said connectivity APP is wirelessly connected to each lighting device of said plurality lighting device for generating, assigning, receiving, setting and recording a location code, a group code and/or at least one universal code to each lighting device of said plurality of lighting devices, wherein said location code, said group code and or said at least one universal code are stored in a memory unit of each lighting device, wherein after said data base of installed locations for said plurality of lighting device being fully established each lighting device displayed visually on a screen of said mobile device becomes identifiable on said connectivity APP to a user to perform a grouping or re-grouping job, wherein said location code is used for controlling only one lighting device, wherein said group code is used for controlling all lighting devices in the same group, wherein said at least one universal code is used for controlling all lighting devices; using a controller electrically coupled with a switching circuitry electrically connected between a power source and a light-emitting unit in each lighting device to output a control signal to control a conduction rate of said switching circuitry for operating said functional performances including on/off performance and dimming performance; using a wireless signal receiver, electrically coupled with said controller for receiving and processing at least two types of wireless external control signals; wherein a first type of wireless external control signals is a location code setting signal, a group code setting signal or at least one universal setting signal generated by and transmitted from said connectivity APP of said mobile device; wherein a second type of wireless external control signals is an instruction signal prefixed with said location code, said group code or said at least one universal code from said mobile device; and using a software program designed in said controller of each lighting device to receive and process said location code, said group code or said at least one universal code to be memorized in a memory unit for checking and verifying said instruction signal with said location code from said mobile device for operating said functional performances, wherein if an identification code of said instruction signal is identical to one of said location code, said group code or said at least one universal code in said memory unit, said controller operates to process said instruction signal to activate a corresponding illumination performance according to said instruction signal received.
 59. The APP based setting method according to claim 58, wherein said first operating process for generating said data base of installed locations for said plurality of lighting devices is implemented by individually connecting each of said plurality lighting devices to said connectivity APP by turns such that each lighting device is assigned a different location code to form said data base of installed locations.
 60. The APP based setting method according to claim 58, wherein said first operating process for generating said data base of installed locations for said plurality of lighting devices is implemented by using a map utilizing GPS or similar satellite position systems to locate each lighting device to form said data base of installed locations.
 61. An APP based setting method, for wirelessly selecting and exclusively controlling a functional performance of a ceiling fan or a group of selected ceiling fans among a plurality of ceiling fans, comprising: using a connectivity APP designed and loaded in a mobile device to perform two operating processes including a first operating process for generating a data base of installed locations for all of said plurality of ceiling fans with each of said plurality of ceiling fans being assigned a location code for identification and for individual performance control, and a second operating process for performing a grouping job to establish at least one group of linkable ceiling fans with said at least one group of linkable ceiling fans being assigned a group code applicable to each ceiling fan in said at least one group for identification and for synchronously performing same illumination; wherein said connectivity APP is wirelessly connected with each ceiling fan of said plurality ceiling fans for generating, assigning, receiving, setting and recording a location code, a group code and/or at least one universal code to each of said plurality of ceiling fans, wherein said location code, said group code and or said at least one universal code are stored in a memory unit of each ceiling fan, wherein after said data base of installed locations for said plurality of ceiling fans being fully established each ceiling fan displayed visually on a screen of said mobile device becomes identifiable on said connectivity APP to a user to perform a grouping or re-grouping job, wherein said location code is used for controlling only one ceiling fan, wherein said group code is used for controlling all ceiling fans in the same group, wherein said at least one universal code is used for controlling all ceiling fans; using a controller electrically coupled with a switching circuitry electrically connected between a power source and a motor in each ceiling fan to output a control signal to control a conduction rate of said switching circuitry for operating said functional performance including on/off performance and speed performance; using a wireless signal receiver, electrically coupled with said controller for receiving and processing at least two types of wireless external control signals; wherein a first type of wireless external control signal is a location code setting signal, a group code setting signal or at least one universal setting signal generated by and transmitted from said connectivity APP of said mobile device; wherein a second type of wireless external control signal is an instruction signal prefixed with said location code, said group code or said at least one universal code from said mobile device; and using a software program designed in said controller of each ceiling fan to receive and process said location code, said group code or said at least one universal code to be memorized in a memory unit for checking and verifying instruction signals with said location code, said group code or said at least one universal code from said mobile device for operating said functional performance wherein if an identification code of an instruction signal is identical to one of said location code, said group code or said at least one universal code in said memory unit, said controller operates to process said instruction signals to activate a corresponding ceiling fan performance according to said instruction signal received.
 62. The APP based setting method according to claim 61, wherein said first operating process for generating said data base of installed locations for said plurality of ceiling fans is implemented by individually connecting each of said plurality ceiling fans to said connectivity APP by turns such that each ceiling fan is assigned a different location code to form said data base of installed locations.
 63. The APP based setting method according to claim 61, wherein said first operating process for generating said data base of installed locations for said plurality of ceiling fans is implemented by using a map utilizing GPS or similar satellite position systems to locate each ceiling fan to form said data base of installed locations. 